Unify DecoderSelectors into one templated class.

BUG=329379

Review URL: https://codereview.chromium.org/103173007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247348 0039d316-1c4b-4281-b951-d872f2087c98
TrackedPreferences are initialized when a profile is created or loaded. But profiles that have not been loaded are not being tracked.

At startup, identify profiles whose PrefHashStores have not been initialized and initialize them.

BUG=336478

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=247250

Review URL: https://codereview.chromium.org/117593002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247349 0039d316-1c4b-4281-b951-d872f2087c98
[WebsiteSettings, MediaStream] Implement a permission bubble client for the media stream permission request.

Review URL: https://codereview.chromium.org/134653004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247350 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247350
IndexedDB: fsync after transactions.

IndexedDB corruption rose, only on CrOS, in the 32 release. Included in
that release was a change that stopped calling fsync after transactions 
commit. It is the only IDB change that possibly sacrficed stability to get
better performance. So: revert it and see if corruption jumps back to 31
levels.

BUG=299831,338385

Review URL: https://codereview.chromium.org/137423006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247351 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247351