SyncFS: Clean up callbacks in v1 tests

BUG=n/a
TEST=should pass all existing tests

Review URL: https://codereview.chromium.org/80973002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238414 0039d316-1c4b-4281-b951-d872f2087c98
Remove plumbing for showing HTML notifications from content/.

WebNotification::isHTML() has been returning false since late July when
we removed the Web Exposed entry point, so all of this is dead code. The
removal shipped in Chrome 30, so it's unlikely to return.

BUG=

Review URL: https://codereview.chromium.org/95223003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238415 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238415
Added CrOS startup sound.

BUG=315108
TEST=manual tests on lumpy and pixel

Review URL: https://codereview.chromium.org/98583004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238416 0039d316-1c4b-4281-b951-d872f2087c98
Files.app: Don't pass {singleton: false} to chrome.app.window.create.

It's deprecated in r233176 and the option is the current default.

BUG=231166

Review URL: https://codereview.chromium.org/101353002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238417 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 238417