Update trace-viewer to r1173

TBR=dsinclair
NOTRY=True

Review URL: https://codereview.chromium.org/180763003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253332 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253333 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253333
Update WebKit to r167843.

BUG=none
TEST=none
TBR=haraken

Review URL: https://codereview.chromium.org/180943002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253334 0039d316-1c4b-4281-b951-d872f2087c98
Update .DEPS.git

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253335 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253335