Remove deprecated methods.

These methods are no longer used.

TBR=nyquist

Review URL: https://codereview.chromium.org/26155005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228811 0039d316-1c4b-4281-b951-d872f2087c98
IndexedDB: Replace static conversion function with member accessor

In the ancient times, there was an abstraction around backing store
types and a helper function was needed to dig the LevelDBTransaction
out of an IndexedDBTransaction and hide a static cast. In this more
enlightened age, it can just be an accessor.

Review URL: https://codereview.chromium.org/26259007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228812 0039d316-1c4b-4281-b951-d872f2087c98
Enable chromium trace when atrace is started.

The X event change (https://codereview.chromium.org/23799005/) depends
on the TraceBuffer to handle X events, so we need to enable chromium
trace when using systrace on Android to trace WebView or Chrome.

Part of this change is separated from https://codereview.chromium.org/26675003/
which is not ready to submit before WebView and Android are ready for
combined trace.

BUG=trace-viewer:142

Review URL: https://codereview.chromium.org/26848006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228813 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228812
SVN changes up to revision 228813