Roll src/third_party/libvpx/source/libvpx/ c62d9d568..18d260d13 (3 commits)

https://chromium.googlesource.com/webm/libvpx.git/+log/c62d9d568fc6..18d260d13f2b

$ git log c62d9d568..18d260d13 --date=short --no-merges --format='%ad %ae %s'
2018-12-13 marpan vp8-mfqe: Increase initial frame# threshold
2018-12-13 marpan vp9-svc: On scene change: only reset TL in flexible mode.
2018-12-13 jingning Make the use of tpl model controlled by the encoder params

Created with:
  roll-dep src/third_party/libvpx/source/libvpx
R=johannkoenig@google.com

Change-Id: I2a449f99dfe6464e945a20b45354cf21e6db389a
Reviewed-on: https://chromium-review.googlesource.com/c/1377728
Reviewed-by: Tom Finegan <tomfinegan@chromium.org>
Commit-Queue: Marco Paniconi <marpan@google.com>
Cr-Commit-Position: refs/heads/master@{#616601}
diff --git a/DEPS b/DEPS
index d06375aa..36df7b1 100644
--- a/DEPS
+++ b/DEPS
@@ -913,7 +913,7 @@
   },
 
   'src/third_party/libvpx/source/libvpx':
-    Var('chromium_git') + '/webm/libvpx.git' + '@' +  'c62d9d568fc62a7efbc45083e06f557a063c449c',
+    Var('chromium_git') + '/webm/libvpx.git' + '@' +  '18d260d13f2be7ff1c5bc7b75edc3ab2b917cf83',
 
   'src/third_party/libwebm/source':
     Var('chromium_git') + '/webm/libwebm.git' + '@' + 'e4931ebc0a816458c18a6734e91a4d1b5acd5c56',
diff --git a/third_party/libvpx/README.chromium b/third_party/libvpx/README.chromium
index b345d07..d823da5 100644
--- a/third_party/libvpx/README.chromium
+++ b/third_party/libvpx/README.chromium
@@ -7,7 +7,7 @@
 
 Date: Thursday December 13 2018
 Branch: master
-Commit: c62d9d568fc62a7efbc45083e06f557a063c449c
+Commit: 18d260d13f2be7ff1c5bc7b75edc3ab2b917cf83
 
 Description:
 Contains the sources used to compile libvpx binaries used by Google Chrome and
diff --git a/third_party/libvpx/source/config/vpx_version.h b/third_party/libvpx/source/config/vpx_version.h
index d64c8c82..4fd3ac7 100644
--- a/third_party/libvpx/source/config/vpx_version.h
+++ b/third_party/libvpx/source/config/vpx_version.h
@@ -2,7 +2,7 @@
 #define VERSION_MAJOR  1
 #define VERSION_MINOR  7
 #define VERSION_PATCH  0
-#define VERSION_EXTRA  "1507-gc62d9d568"
+#define VERSION_EXTRA  "1511-g18d260d13"
 #define VERSION_PACKED ((VERSION_MAJOR<<16)|(VERSION_MINOR<<8)|(VERSION_PATCH))
-#define VERSION_STRING_NOSP "v1.7.0-1507-gc62d9d568"
-#define VERSION_STRING      " v1.7.0-1507-gc62d9d568"
+#define VERSION_STRING_NOSP "v1.7.0-1511-g18d260d13"
+#define VERSION_STRING      " v1.7.0-1511-g18d260d13"