drive: Implement lock mechanism to ChangeListLoader

ChangeListLoader should be locked while EntryUpdatePerformer is creating a new entry on the server.
Otherwise, it may recieve a change list which contains the new entry and confuse the sync mechanism.

BUG=260539
TEST=unit_tests

Review URL: https://codereview.chromium.org/132903008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247234 0039d316-1c4b-4281-b951-d872f2087c98
Fixed incorrect function name

BUG=337453
TEST=Manually resizing the video elements via the buttons
NOTRY=TRUE

Review URL: https://codereview.chromium.org/143703003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247235 0039d316-1c4b-4281-b951-d872f2087c98
Pass extensions from WebSocketChannel to renderer

BUG=337134
TEST=net_unittests --gtest_filter=WebSocketChannel*

Review URL: https://codereview.chromium.org/145633002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247236 0039d316-1c4b-4281-b951-d872f2087c98
Blink roll 165836:165846

http://build.chromium.org/f/chromium/perf/dashboard/ui/changelog_blink.html?url=/trunk&range=165837:165846&mode=html
TBR=
BUG=

Review URL: https://codereview.chromium.org/148163003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247237 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247238 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247238