Correctly reset FP in RFHI whenever origin changes

Bug: 713364
Change-Id: Id8bb923750e20f3db6fc9358b1d44120513ac95f

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation

Change-Id: Id8bb923750e20f3db6fc9358b1d44120513ac95f
Reviewed-on: https://chromium-review.googlesource.com/482380
Commit-Queue: Ian Clelland <iclelland@chromium.org>
Reviewed-by: Charles Reis <creis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#466778}
RenderWidgetHostViewBase* RenderFrameHostImpl::GetViewForAccessibility() {
  return static_cast<RenderWidgetHostViewBase*>(
      frame_tree_node_->IsMainFrame()
          ? render_view_host_->GetWidget()->GetView()
          : frame_tree_node_->frame_tree()
                ->GetMainFrame()
                ->render_view_host_->GetWidget()
                ->GetView());
}

RenderWidgetHostViewBase* RenderFrameHostImpl::GetViewForAccessibility() {
  return static_cast<RenderWidgetHostViewBase*>(
      frame_tree_node_->IsMainFrame()
          ? render_view_host_->GetWidget()->GetView()
          : frame_tree_node_->frame_tree()
                ->GetMainFrame()
                ->render_view_host_->GetWidget()
                ->GetView());
}
