refactor: use function ref for simple observers

Update simple observers and computed properties to use function
references per JS-Polymer style guide.

Bug: b:263421791
Test: browser_test --gtest_filter=*Shimless*
Change-Id: Ifa7ee12da5451c0f44be633e9f51976894c9dc3a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4117697
Commit-Queue: Ashley Prasad <ashleydp@google.com>
Reviewed-by: Gavin Williams <gavinwill@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1086504}
diff --git a/ash/webui/shimless_rma/resources/calibration_component_chip.js b/ash/webui/shimless_rma/resources/calibration_component_chip.js
index 363b44c6b..4f3b1ce 100644
--- a/ash/webui/shimless_rma/resources/calibration_component_chip.js
+++ b/ash/webui/shimless_rma/resources/calibration_component_chip.js
@@ -56,7 +56,8 @@
       isFirstClickableComponent: {
         type: Boolean,
         value: false,
-        observer: 'onIsFirstClickableComponentChanged_',
+        observer: CalibrationComponentChipElement.prototype
+                      .onIsFirstClickableComponentChanged_,
       },
 
       /** @type {number} */
diff --git a/ash/webui/shimless_rma/resources/onboarding_enter_rsu_wp_disable_code_page.js b/ash/webui/shimless_rma/resources/onboarding_enter_rsu_wp_disable_code_page.js
index a6b2c5d..5d15113 100644
--- a/ash/webui/shimless_rma/resources/onboarding_enter_rsu_wp_disable_code_page.js
+++ b/ash/webui/shimless_rma/resources/onboarding_enter_rsu_wp_disable_code_page.js
@@ -57,7 +57,8 @@
        */
       errorCode: {
         type: Object,
-        observer: 'onErrorCodeChanged_',
+        observer:
+            OnboardingEnterRsuWpDisableCodePage.prototype.onErrorCodeChanged_,
       },
 
       /** @protected */
@@ -82,7 +83,8 @@
       rsuCode_: {
         type: String,
         value: '',
-        observer: 'onRsuCodeChanged_',
+        observer:
+            OnboardingEnterRsuWpDisableCodePage.prototype.onRsuCodeChanged_,
       },
 
       /** @protected */
diff --git a/ash/webui/shimless_rma/resources/onboarding_network_page.js b/ash/webui/shimless_rma/resources/onboarding_network_page.js
index 57c0711f..c94e0c0 100644
--- a/ash/webui/shimless_rma/resources/onboarding_network_page.js
+++ b/ash/webui/shimless_rma/resources/onboarding_network_page.js
@@ -132,7 +132,7 @@
       isOnline_: {
         type: Boolean,
         value: false,
-        observer: 'onIsOnlineChange_',
+        observer: OnboardingNetworkPage.prototype.onIsOnlineChange_,
       },
     };
   }
diff --git a/ash/webui/shimless_rma/resources/onboarding_update_page.js b/ash/webui/shimless_rma/resources/onboarding_update_page.js
index 28f845e..740fb97 100644
--- a/ash/webui/shimless_rma/resources/onboarding_update_page.js
+++ b/ash/webui/shimless_rma/resources/onboarding_update_page.js
@@ -82,7 +82,8 @@
       updateInProgress_: {
         type: Boolean,
         value: false,
-        observer: 'onUpdateInProgressChange_',
+        observer:
+            OnboardingUpdatePageElement.prototype.onUpdateInProgressChange_,
       },
 
       /** @protected */
diff --git a/ash/webui/shimless_rma/resources/repair_component_chip.js b/ash/webui/shimless_rma/resources/repair_component_chip.js
index 7894cf7..3b900da 100644
--- a/ash/webui/shimless_rma/resources/repair_component_chip.js
+++ b/ash/webui/shimless_rma/resources/repair_component_chip.js
@@ -71,7 +71,8 @@
       isFirstClickableComponent: {
         type: Boolean,
         value: false,
-        observer: 'onIsFirstClickableComponentChanged_',
+        observer:
+            RepairComponentChip.prototype.onIsFirstClickableComponentChanged_,
       },
 
     };