Translate: Bug fix: Activate a tab when the URL includes a fragment

For example, Opening chrome://translate-internals/#detection-logs should show the page with the opend tab 'Detection Logs', but currently it doesn't.  This CL fixes the bug by calling the function to read the hash and select the tab when opening translate-internals.

BUG=
TEST=manual

Review URL: https://codereview.chromium.org/24480004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226197 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226197