AutoFill: Release the cached frame when we receive the frameDestroyed() message
from WebKit.

BUG=48857
TEST=none

Review URL: http://codereview.chromium.org/3173005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@55789 0039d316-1c4b-4281-b951-d872f2087c98
void RenderView::CreatedPluginWindow(gfx::PluginWindowHandle window) {
#if defined(USE_X11)
  RenderThread::current()->Send(new ViewHostMsg_CreatePluginContainer(
      routing_id(), window));
#endif
}

void RenderView::CreatedPluginWindow(gfx::PluginWindowHandle window) {
#if defined(USE_X11)
  RenderThread::current()->Send(new ViewHostMsg_CreatePluginContainer(
      routing_id(), window));
#endif
}
