diff --git a/DEPS b/DEPS
index 4912f7f4db..7c26e9a142 100644
--- a/DEPS
+++ b/DEPS
@@ -3,7 +3,7 @@ vars = {
   # If you do not know, use the full path while defining your new deps entry.
   "googlecode_url": "http://%s.googlecode.com/svn",
   "chromium_trunk" : "http://src.chromium.org/svn/trunk",
-  "chromium_revision": "134666",
+  "chromium_revision": "140240",
 
   # External resources like video and audio files used for testing purposes.
   # Downloaded on demand when needed.
diff --git a/third_party/google-gflags/google-gflags.gyp b/third_party/google-gflags/google-gflags.gyp
index bd7a3edd4b..cd75ad5d96 100644
--- a/third_party/google-gflags/google-gflags.gyp
+++ b/third_party/google-gflags/google-gflags.gyp
@@ -56,6 +56,11 @@
             'src/windows/port.cc',
           ],
         }],
+        ['OS=="mac" and clang==1', {
+          'xcode_settings': {
+            'WARNING_CFLAGS!': ['-Wheader-hygiene'],
+          },
+        }],
       ],
     },
   ],
diff --git a/third_party/libvpx/libvpx.gyp b/third_party/libvpx/libvpx.gyp
index 6bb46c2380..8c971731fe 100644
--- a/third_party/libvpx/libvpx.gyp
+++ b/third_party/libvpx/libvpx.gyp
@@ -7,6 +7,21 @@
 # libvpx_include, libvpx_lib.
 # http://src.chromium.org/svn/trunk/deps/third_party/libvpx/libvpx.gyp
 {
+  # The target_defaults block is unique to the WebRTC libvpx.gyp.
+  'target_defaults': {
+    'conditions': [
+      ['OS=="mac"', {
+        'xcode_settings': {
+          'WARNING_CFLAGS': [
+            '-Wno-implicit-function-declaration',
+            # TODO(andrew): this one should be fixed upstream.
+            '-Wno-parentheses-equality',
+            '-Wno-conversion',
+          ],
+        },
+      }],
+    ],
+  },
   'variables': {
     'conditions': [
       ['os_posix==1', {