Update owners of chrome/browser/chromeos/accessibility.

dtseng and plundblad are now primary owners, zork and hashimoto are no
longer working on accessibility.

BUG=none
R=zork@chromium.org

Review URL: https://codereview.chromium.org/102963008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243161 0039d316-1c4b-4281-b951-d872f2087c98
Return error on JSON request failures

Previously on a TracingController error, OnBeginRequest returns false,
and then WebUIDataSource will return the default resource (tracing.html).
This will cause a successful XHR request and a JSON parse failure in
tracing frontend code. Return "##ERROR##" to express the error so that
the frontend can handle the error.

BUG=331286

Review URL: https://codereview.chromium.org/117323008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243162 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243162
Make VideoDecoder use (kAborted, NULL) to signify an aborted decode, instead of (kOk, NULL).

This makes it match its sibling, AudioDecoder.

BUG=329379

Review URL: https://codereview.chromium.org/123213006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243163 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243163