[monorail] Add lit-element, lit-html, pwa-helpers.

* lit-element: To replace Polymer. \o/
* lit-html: We will likely want to use some directives to customize templates.
* pwa-helpers: We can use connect-mixin to replace polymer-redux.

https://lit-html.polymer-project.org/guide/template-reference#built-in-directives

Bug: monorail:4839
Change-Id: I0450f3af98436937a84b512ccd455a4ebe81af1f
Reviewed-on: https://chromium-review.googlesource.com/c/infra/infra/+/1566462
Reviewed-by: Tiffany Zhang <zhangtiff@chromium.org>
Commit-Queue: Dave Tu <dtu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#22408}
diff --git a/appengine/monorail/package-lock.json b/appengine/monorail/package-lock.json
index f2e8ee6..b5937c0 100644
--- a/appengine/monorail/package-lock.json
+++ b/appengine/monorail/package-lock.json
@@ -24,7 +24,7 @@
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       "requires": {
-        "@polymer/polymer": "3.1.0"
+        "@polymer/polymer": "^3.0.0"
       }
     },
     "@polymer/iron-collapse": {
@@ -32,8 +32,8 @@
       "resolved": "https://registry.npmjs.org/@polymer/iron-collapse/-/iron-collapse-3.0.1.tgz",
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       "requires": {
-        "@polymer/iron-resizable-behavior": "3.0.1",
-        "@polymer/polymer": "3.1.0"
+        "@polymer/iron-resizable-behavior": "^3.0.0-pre.26",
+        "@polymer/polymer": "^3.0.0"
       }
     },
     "@polymer/iron-fit-behavior": {
@@ -41,7 +41,7 @@
       "resolved": "https://registry.npmjs.org/@polymer/iron-fit-behavior/-/iron-fit-behavior-3.0.1.tgz",
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       "requires": {
-        "@polymer/polymer": "3.1.0"
+        "@polymer/polymer": "^3.0.0"
       }
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     "@polymer/iron-flex-layout": {
@@ -49,7 +49,7 @@
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       "requires": {
-        "@polymer/polymer": "3.1.0"
+        "@polymer/polymer": "^3.0.0"
       }
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     "@polymer/iron-overlay-behavior": {
@@ -57,10 +57,10 @@
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       "requires": {
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-        "@polymer/iron-fit-behavior": "3.0.1",
-        "@polymer/iron-resizable-behavior": "3.0.1",
-        "@polymer/polymer": "3.1.0"
+        "@polymer/iron-a11y-keys-behavior": "^3.0.0-pre.26",
+        "@polymer/iron-fit-behavior": "^3.0.0-pre.26",
+        "@polymer/iron-resizable-behavior": "^3.0.0-pre.26",
+        "@polymer/polymer": "^3.0.0"
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     "@polymer/iron-resizable-behavior": {
@@ -68,7 +68,7 @@
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       "requires": {
-        "@polymer/polymer": "3.1.0"
+        "@polymer/polymer": "^3.0.0"
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     "@polymer/paper-styles": {
@@ -76,9 +76,9 @@
       "resolved": "https://registry.npmjs.org/@polymer/paper-styles/-/paper-styles-3.0.1.tgz",
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-        "@polymer/font-roboto": "3.0.2",
-        "@polymer/iron-flex-layout": "3.0.1",
-        "@polymer/polymer": "3.1.0"
+        "@polymer/font-roboto": "^3.0.1",
+        "@polymer/iron-flex-layout": "^3.0.0-pre.26",
+        "@polymer/polymer": "^3.0.0"
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     "@polymer/paper-tooltip": {
@@ -86,8 +86,8 @@
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-        "@polymer/paper-styles": "3.0.1",
-        "@polymer/polymer": "3.1.0"
+        "@polymer/paper-styles": "^3.0.0-pre.26",
+        "@polymer/polymer": "^3.0.0"
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     "@polymer/polymer": {
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-        "@webcomponents/shadycss": "1.8.0"
+        "@webcomponents/shadycss": "^1.5.2"
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       "dev": true,
       "requires": {
-        "@sinonjs/samsam": "3.0.2"
+        "@sinonjs/samsam": "^2 || ^3"
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-        "array-from": "2.1.1",
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+        "@sinonjs/commons": "^1.0.2",
+        "array-from": "^2.1.1",
+        "lodash.get": "^4.4.2"
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     "@webassemblyjs/ast": {
@@ -209,7 +209,7 @@
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       "dev": true,
       "requires": {
-        "@xtuc/ieee754": "1.2.0"
+        "@xtuc/ieee754": "^1.2.0"
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     "@webassemblyjs/leb128": {
@@ -341,7 +341,7 @@
       "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=",
       "dev": true,
       "requires": {
-        "mime-types": "2.1.21",
+        "mime-types": "~2.1.18",
         "negotiator": "0.6.1"
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@@ -363,7 +363,7 @@
       "integrity": "sha1-r9+UiPsezvyDSPb7IvRk4ypYs2s=",
       "dev": true,
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-        "acorn": "3.3.0"
+        "acorn": "^3.0.4"
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@@ -378,7 +378,7 @@
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       "dev": true,
       "requires": {
-        "es6-promisify": "5.0.0"
+        "es6-promisify": "^5.0.0"
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     "ajv": {
@@ -387,10 +387,10 @@
       "integrity": "sha1-c7Xuyj+rZT49P5Qis0GtQiBdyWU=",
       "dev": true,
       "requires": {
-        "co": "4.6.0",
-        "fast-deep-equal": "1.1.0",
-        "fast-json-stable-stringify": "2.0.0",
-        "json-schema-traverse": "0.3.1"
+        "co": "^4.6.0",
+        "fast-deep-equal": "^1.0.0",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.3.0"
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     "ajv-errors": {
@@ -436,8 +436,8 @@
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       "dev": true,
       "requires": {
-        "micromatch": "3.1.10",
-        "normalize-path": "2.1.1"
+        "micromatch": "^3.1.4",
+        "normalize-path": "^2.1.1"
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     "aproba": {
@@ -452,7 +452,7 @@
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       "dev": true,
       "requires": {
-        "sprintf-js": "1.0.3"
+        "sprintf-js": "~1.0.2"
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@@ -503,7 +503,7 @@
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       "dev": true,
       "requires": {
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+        "array-uniq": "^1.0.1"
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@@ -536,9 +536,9 @@
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       "dev": true,
       "requires": {
-        "bn.js": "4.11.8",
-        "inherits": "2.0.3",
-        "minimalistic-assert": "1.0.1"
+        "bn.js": "^4.0.0",
+        "inherits": "^2.0.1",
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@@ -609,9 +609,9 @@
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       "dev": true,
       "requires": {
-        "chalk": "1.1.3",
-        "esutils": "2.0.2",
-        "js-tokens": "3.0.2"
+        "chalk": "^1.1.3",
+        "esutils": "^2.0.2",
+        "js-tokens": "^3.0.2"
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@@ -620,11 +620,11 @@
           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
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-            "has-ansi": "2.0.0",
-            "strip-ansi": "3.0.1",
-            "supports-color": "2.0.0"
+            "ansi-styles": "^2.2.1",
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@@ -639,7 +639,7 @@
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           "dev": true,
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-        "jsesc": "1.3.0",
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@@ -675,8 +675,8 @@
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@@ -693,11 +693,11 @@
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@@ -706,15 +706,15 @@
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-        "debug": "2.6.9",
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-        "invariant": "2.2.4",
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+        "globals": "^9.18.0",
+        "invariant": "^2.2.2",
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@@ -740,10 +740,10 @@
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+        "esutils": "^2.0.2",
+        "lodash": "^4.17.4",
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+        "define-property": "^1.0.0",
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+        "mixin-deep": "^1.2.0",
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@@ -793,7 +793,7 @@
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-        "hoopy": "0.1.4",
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+        "bluebird": "^3.5.1",
+        "check-types": "^7.3.0",
+        "hoopy": "^0.1.2",
+        "tryer": "^1.0.0"
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@@ -903,15 +903,15 @@
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+        "content-type": "~1.0.4",
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-        "depd": "1.1.2",
-        "http-errors": "1.6.3",
+        "depd": "~1.1.2",
+        "http-errors": "~1.6.3",
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-        "on-finished": "2.3.0",
+        "on-finished": "~2.3.0",
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+        "type-is": "~1.6.16"
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@@ -947,16 +947,16 @@
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-        "split-string": "3.1.0",
-        "to-regex": "3.0.2"
+        "arr-flatten": "^1.1.0",
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+        "extend-shallow": "^2.0.1",
+        "fill-range": "^4.0.0",
+        "isobject": "^3.0.1",
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+            "acorn": "^5.5.0",
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@@ -2265,8 +2265,8 @@
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@@ -2948,7 +2948,7 @@
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@@ -3115,7 +3115,7 @@
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-            "yallist": "3.0.3"
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-            "iconv-lite": "0.4.24",
-            "sax": "1.2.4"
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-            "rc": "1.2.8",
-            "rimraf": "2.6.3",
-            "semver": "5.6.0",
-            "tar": "4.4.8"
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@@ -3190,8 +3190,8 @@
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-            "osenv": "0.1.5"
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-            "gauge": "2.7.4",
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@@ -3238,7 +3238,7 @@
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@@ -3359,9 +3359,9 @@
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@@ -3370,7 +3370,7 @@
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@@ -3378,7 +3378,7 @@
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@@ -3393,13 +3393,13 @@
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-            "safe-buffer": "5.1.2",
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@@ -3414,7 +3414,7 @@
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-        "once": "1.4.0",
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+        "fs.realpath": "^1.0.0",
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@@ -3479,8 +3479,8 @@
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@@ -3489,7 +3489,7 @@
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@@ -3500,9 +3500,9 @@
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-        "is-windows": "1.0.2",
-        "resolve-dir": "1.0.1"
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-        "is-windows": "1.0.2",
-        "which": "1.3.1"
+        "expand-tilde": "^2.0.2",
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-        "pify": "2.3.0",
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-        "source-map": "0.6.1",
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@@ -3609,7 +3609,7 @@
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@@ -3653,9 +3653,9 @@
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-        "has-values": "1.0.0",
-        "isobject": "3.0.1"
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@@ -3664,8 +3664,8 @@
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@@ -3674,7 +3674,7 @@
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@@ -3685,8 +3685,8 @@
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@@ -3695,8 +3695,8 @@
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-        "minimalistic-assert": "1.0.1"
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@@ -3711,9 +3711,9 @@
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-        "minimalistic-crypto-utils": "1.0.1"
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@@ -3722,7 +3722,7 @@
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       "dev": true,
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+        "parse-passwd": "^1.0.0"
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@@ -3743,10 +3743,10 @@
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       "dev": true,
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@@ -3763,9 +3763,9 @@
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-        "follow-redirects": "1.6.1",
-        "requires-port": "1.0.0"
+        "eventemitter3": "^3.0.0",
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-        "debug": "3.1.0"
+        "agent-base": "^4.1.0",
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+        "safer-buffer": ">= 2.1.2 < 3"
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@@ -3817,8 +3817,8 @@
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-        "resolve-cwd": "2.0.0"
+        "pkg-dir": "^3.0.0",
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@@ -3833,7 +3833,7 @@
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       "dev": true,
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@@ -3848,8 +3848,8 @@
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-        "wrappy": "1.0.2"
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-        "external-editor": "2.2.0",
-        "figures": "2.0.0",
-        "lodash": "4.17.10",
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-        "strip-ansi": "4.0.0",
-        "through": "2.3.8"
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@@ -3898,7 +3898,7 @@
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+        "loose-envify": "^1.0.0"
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@@ -3913,7 +3913,7 @@
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@@ -3922,7 +3922,7 @@
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@@ -3939,7 +3939,7 @@
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@@ -3954,7 +3954,7 @@
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-        "readable-stream": "2.3.6"
+        "cyclist": "~0.2.2",
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@@ -5347,7 +5360,7 @@
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-        "pify": "2.3.0",
-        "pinkie-promise": "2.0.1"
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+        "string-width": "^2.0.0",
+        "which-module": "^2.0.0",
+        "y18n": "^3.2.1 || ^4.0.0",
+        "yargs-parser": "^11.1.1"
       },
       "dependencies": {
         "camelcase": {
@@ -7680,11 +7698,11 @@
           "integrity": "sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==",
           "dev": true,
           "requires": {
-            "nice-try": "1.0.5",
-            "path-key": "2.0.1",
-            "semver": "5.5.0",
-            "shebang-command": "1.2.0",
-            "which": "1.3.1"
+            "nice-try": "^1.0.4",
+            "path-key": "^2.0.1",
+            "semver": "^5.5.0",
+            "shebang-command": "^1.2.0",
+            "which": "^1.2.9"
           }
         },
         "execa": {
@@ -7693,13 +7711,13 @@
           "integrity": "sha512-7XOMnz8Ynx1gGo/3hyV9loYNPWM94jG3+3T3Y8tsfSstFmETmENCMU/A/zj8Lyaj1lkgEepKepvd6240tBRvlw==",
           "dev": true,
           "requires": {
-            "cross-spawn": "6.0.5",
-            "get-stream": "3.0.0",
-            "is-stream": "1.1.0",
-            "npm-run-path": "2.0.2",
-            "p-finally": "1.0.0",
-            "signal-exit": "3.0.2",
-            "strip-eof": "1.0.0"
+            "cross-spawn": "^6.0.0",
+            "get-stream": "^3.0.0",
+            "is-stream": "^1.1.0",
+            "npm-run-path": "^2.0.0",
+            "p-finally": "^1.0.0",
+            "signal-exit": "^3.0.0",
+            "strip-eof": "^1.0.0"
           }
         },
         "find-up": {
@@ -7708,7 +7726,7 @@
           "integrity": "sha512-1yD6RmLI1XBfxugvORwlck6f75tYL+iR0jqwsOrOxMZyGYqUuDhJ0l4AXdO1iX/FTs9cBAMEk1gWSEx1kSbylg==",
           "dev": true,
           "requires": {
-            "locate-path": "3.0.0"
+            "locate-path": "^3.0.0"
           }
         },
         "get-stream": {
@@ -7729,7 +7747,7 @@
           "integrity": "sha512-avPEb8P8EGnwXKClwsNUgryVjllcRqtMYa49NTsbQagYuT1DcXnl1915oxWjoyGrXR6zH/Y0Zc96xWsPcoDKeA==",
           "dev": true,
           "requires": {
-            "invert-kv": "2.0.0"
+            "invert-kv": "^2.0.0"
           }
         },
         "locate-path": {
@@ -7738,8 +7756,8 @@
           "integrity": "sha512-7AO748wWnIhNqAuaty2ZWHkQHRSNfPVIsPIfwEOWO22AmaoVrWavlOcMR5nzTLNYvp36X220/maaRsrec1G65A==",
           "dev": true,
           "requires": {
-            "p-locate": "3.0.0",
-            "path-exists": "3.0.0"
+            "p-locate": "^3.0.0",
+            "path-exists": "^3.0.0"
           }
         },
         "mem": {
@@ -7748,9 +7766,9 @@
           "integrity": "sha512-WQxG/5xYc3tMbYLXoXPm81ET2WDULiU5FxbuIoNbJqLOOI8zehXFdZuiUEgfdrU2mVB1pxBZUGlYORSrpuJreA==",
           "dev": true,
           "requires": {
-            "map-age-cleaner": "0.1.3",
-            "mimic-fn": "1.2.0",
-            "p-is-promise": "1.1.0"
+            "map-age-cleaner": "^0.1.1",
+            "mimic-fn": "^1.0.0",
+            "p-is-promise": "^1.1.0"
           }
         },
         "os-locale": {
@@ -7759,9 +7777,9 @@
           "integrity": "sha512-7g5e7dmXPtzcP4bgsZ8ixDVqA7oWYuEz4lOSujeWyliPai4gfVDiFIcwBg3aGCPnmSGfzOKTK3ccPn0CKv3DBw==",
           "dev": true,
           "requires": {
-            "execa": "0.10.0",
-            "lcid": "2.0.0",
-            "mem": "4.0.0"
+            "execa": "^0.10.0",
+            "lcid": "^2.0.0",
+            "mem": "^4.0.0"
           }
         },
         "p-limit": {
@@ -7770,7 +7788,7 @@
           "integrity": "sha512-fl5s52lI5ahKCernzzIyAP0QAZbGIovtVHGwpcu1Jr/EpzLVDI2myISHwGqK7m8uQFugVWSrbxH7XnhGtvEc+A==",
           "dev": true,
           "requires": {
-            "p-try": "2.0.0"
+            "p-try": "^2.0.0"
           }
         },
         "p-locate": {
@@ -7779,7 +7797,7 @@
           "integrity": "sha512-x+12w/To+4GFfgJhBEpiDcLozRJGegY+Ei7/z0tSLkMmxGZNybVMSfWj9aJn8Z5Fc7dBUNJOOVgPv2H7IwulSQ==",
           "dev": true,
           "requires": {
-            "p-limit": "2.0.0"
+            "p-limit": "^2.0.0"
           }
         },
         "p-try": {
@@ -7794,8 +7812,8 @@
           "integrity": "sha512-C6kB/WJDiaxONLJQnF8ccx9SEeoTTLek8RVbaOIsrAUS8VrBEXfmeSnCZxygc+XC2sNMBIwOOnfcxiynjHsVSQ==",
           "dev": true,
           "requires": {
-            "camelcase": "5.0.0",
-            "decamelize": "1.2.0"
+            "camelcase": "^5.0.0",
+            "decamelize": "^1.2.0"
           }
         }
       }
@@ -7806,7 +7824,7 @@
       "integrity": "sha1-lSj0QtqxsihOWLQ3m7GU4i4MQAU=",
       "dev": true,
       "requires": {
-        "fd-slicer": "1.0.1"
+        "fd-slicer": "~1.0.1"
       }
     },
     "yeast": {
diff --git a/appengine/monorail/package.json b/appengine/monorail/package.json
index 71e0ce0..7a49af4 100644
--- a/appengine/monorail/package.json
+++ b/appengine/monorail/package.json
@@ -38,11 +38,14 @@
     "@webcomponents/webcomponentsjs": "^2.2.7",
     "chart.js": "^2.7.2",
     "diff": "^4.0.1",
+    "lit-element": "^2.0.0",
+    "lit-html": "^1.0.0",
     "mousetrap": "^1.6.3",
     "noclosure-resin-bridge": "^1.0.0",
     "page": "^1.11.3",
     "polymer-redux": "^2.0.0-beta.2",
     "polymer-resin": "^2.0.0",
+    "pwa-helpers": "^0.9.0",
     "qs": "^6.6.0",
     "redux": "^4.0.0",
     "redux-thunk": "^2.0.0",
diff --git a/appengine/monorail/static_src/elements/redux/redux-mixin.js b/appengine/monorail/static_src/elements/redux/redux-mixin.js
index 2107a96..979b16b 100644
--- a/appengine/monorail/static_src/elements/redux/redux-mixin.js
+++ b/appengine/monorail/static_src/elements/redux/redux-mixin.js
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import {createMixin} from 'polymer-redux';
+import {connect} from 'pwa-helpers/connect-mixin.js';
 import {applyMiddleware, combineReducers, compose, createStore} from 'redux';
 import thunk from 'redux-thunk';
 import * as issue from './issue.js';
@@ -54,3 +55,5 @@
 ));
 
 export const ReduxMixin = createMixin(store);
+
+export const connectStore = connect(store);