Fix the underlying problem for Trunk/ToT build 19.0.1063.0: crash during start.

The fix is to remove the unintended duplicated observer_ definition in the sub class.

BUG=117347
TEST=Manual test to start chrome with auto-hiding taskbar enabled on win

Review URL: https://chromiumcodereview.appspot.com/9657007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@125697 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed