Avoid double-deletion of the JavaBridgeDispatcher

Currently the JavaBridgeDispatcher can be double-deleted because it ...
- is owned by RenderViewImpl with a scoped_ptr
- uses the default implementation of RenderViewObserver::OnDestruct(), which
  deletes it

This change removes the use of the scoped_ptr, to match other
RenderViewObservers.

Review URL: https://chromiumcodereview.appspot.com/10383100

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@136865 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed