Delete the IndexedDB Page Cycler test.

indexeddb_perf has been enhanced to include the few things missing that was
performed by this test. This test is now redundant.

BUG=196406

Review URL: https://codereview.chromium.org/155203002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249070 0039d316-1c4b-4281-b951-d872f2087c98
cc: Fix ordering of raster finished signals in PixelRasterWorkerPool.

There's no guarantee that the "required for activation" task
finish running before the "raster finished" task when using
multiple worker threads. These signals don't have to be
generated in the order assumed by PBRWP but enforcing this
allows us to keep existing DCHECKs.

BUG=340737

Review URL: https://codereview.chromium.org/152083003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249071 0039d316-1c4b-4281-b951-d872f2087c98
Inject ChromeVox component extension into webview on Chrome OS

BUG=328476
TEST=manual
R=dtseng@chromium.org, fsamuel@chromium.org, miket@chromium.org

Review URL: https://codereview.chromium.org/137433009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249072 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249072