Changed BackendImpl::SyncInit() so it creates timer only
if the initialization is completed successfully. This should
prevent the timer code from running if the object is only
partially initialized.

Review URL: https://codereview.chromium.org/98563004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241539 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241539