Roll chromium_revision 5482f56..310ea93 (347609:349094)

The WebKit dependency could be removed again after
https://codereview.chromium.org/1338193003/

Relevant changes:
* src/buildtools: 565d04e..f7310ee
* src/third_party/boringssl/src: ac8302a..1d128f3
* src/third_party/libvpx: 0304cef..ac1772e
* src/third_party/libyuv: 0bc626a..fcacbfb
* src/third_party/mockito/src: ed99a52..4d987dc
* src/tools/swarming_client: 2866a22..77f720b
Details: https://chromium.googlesource.com/chromium/src/+/5482f56..310ea93/DEPS

Clang version was not updated in this roll.

TBR=marpan@webrtc.org

Review URL: https://codereview.webrtc.org/1347153003 .

Cr-Commit-Position: refs/heads/master@{#9962}
diff --git a/.gn b/.gn
index 738ed03..e15f3c5 100644
--- a/.gn
+++ b/.gn
@@ -42,6 +42,5 @@
   "//build/toolchain/win/BUILD.gn",
   "//third_party/boringssl/BUILD.gn",
   "//third_party/opus/BUILD.gn",
-  "//third_party/WebKit/Source/config.gni",
   "//webrtc/modules/video_render/BUILD.gn",
 ]
diff --git a/DEPS b/DEPS
index c862652..e524512 100644
--- a/DEPS
+++ b/DEPS
@@ -6,7 +6,7 @@
 vars = {
   'extra_gyp_flag': '-Dextra_gyp_flag=0',
   'chromium_git': 'https://chromium.googlesource.com',
-  'chromium_revision': '5482f563e441be7ab1cf59a02e3fd9e010e9535b',
+  'chromium_revision': '310ea93837e4a95944fcd82ff54d0e0ea5186a2c',
 }
 
 # NOTE: Prefer revision numbers to tags for svn deps. Use http rather than
diff --git a/chromium/.gclient b/chromium/.gclient
index 7f46333..573a455 100644
--- a/chromium/.gclient
+++ b/chromium/.gclient
@@ -17,6 +17,7 @@
     'src/third_party/skia': None,
     'src/third_party/trace-viewer': None,
     'src/third_party/webrtc': None,
+    'src/third_party/WebKit': None,
   },
   'safesync_url': ''
 }]
diff --git a/setup_links.py b/setup_links.py
index bc46202..1a155a7 100755
--- a/setup_links.py
+++ b/setup_links.py
@@ -62,7 +62,6 @@
   'third_party/sqlite',
   'third_party/syzygy',
   'third_party/usrsctp',
-  'third_party/WebKit',
   'third_party/yasm',
   'third_party/zlib',
   'tools/clang',