Fix for the 'Unable to add window' crash.

BrowserBookmarksPage:
Added a new onDestroy method to clean up the pending messages in
the handler.

Fixed a bunch of eol whitespaces (use ignore eol ws in gerrit to
make it easy on your eyes)

Bug:2090959
Change-Id: I6c17ea9345878c4c7a93259e0b3e6d92dcc317de
1 file changed