Roll src/third_party/libvpx/source/libvpx/ 7763c888e..4254ecaa0 (5 commits)

https://chromium.googlesource.com/webm/libvpx.git/+log/7763c888e0c0..4254ecaa075e

$ git log 7763c888e..4254ecaa0 --date=short --no-merges --format='%ad %ae %s'
2020-01-26 marpan vp9-rtc: Fix condition in regulate_q for cyclic_refresh
2020-01-26 marpan vp9-svc: Fix to resetting rc flags on change_config
2020-01-17 chengchen Store frame partition info
2020-01-22 marpan vp9-rtc: Lower threshold for color sensitivity for screen
2020-01-17 jzern vpx_timestamp,gcd: assert params are positive

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

Change-Id: I8c0282572308a1db8d049f2506434446181f1ece
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2023185Reviewed-by: Johann Koenig <johannkoenig@google.com>
Commit-Queue: Jerome Jiang <jianj@google.com>
Cr-Commit-Position: refs/heads/master@{#735522}

DEPS

@@ -1186,7 +1186,7 @@ deps = {
   },
 
   'src/third_party/libvpx/source/libvpx':
-    Var('chromium_git') + '/webm/libvpx.git' + '@' +  '7763c888e0c0a0c7b0a25746b11fdc3d53da4f70',
+    Var('chromium_git') + '/webm/libvpx.git' + '@' +  '4254ecaa075e672b66b9d723ebdd3d7ed7125055',
 
   'src/third_party/libwebm/source':
     Var('chromium_git') + '/webm/libwebm.git' + '@' + '51ca718c3adf0ddedacd7df25fe45f67dc5a9ce1',

third_party/libvpx/README.chromium

@@ -5,9 +5,9 @@ License: BSD
 License File: source/libvpx/LICENSE
 Security Critical: yes
 
-Date: Wednesday January 22 2020
+Date: Monday January 27 2020
 Branch: master
-Commit: 7763c888e0c0a0c7b0a25746b11fdc3d53da4f70
+Commit: 4254ecaa075e672b66b9d723ebdd3d7ed7125055
 
 Description:
 Contains the sources used to compile libvpx binaries used by Google Chrome and

third_party/libvpx/source/config/vpx_version.h

@@ -2,8 +2,8 @@
 #define VERSION_MAJOR 1
 #define VERSION_MINOR 8
 #define VERSION_PATCH 2
-#define VERSION_EXTRA "44-g7763c888e"
+#define VERSION_EXTRA "51-g4254ecaa0"
 #define VERSION_PACKED \
   ((VERSION_MAJOR << 16) | (VERSION_MINOR << 8) | (VERSION_PATCH))
-#define VERSION_STRING_NOSP "v1.8.2-44-g7763c888e"
-#define VERSION_STRING " v1.8.2-44-g7763c888e"
+#define VERSION_STRING_NOSP "v1.8.2-51-g4254ecaa0"
+#define VERSION_STRING " v1.8.2-51-g4254ecaa0"