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}
    RenderFrameHostImpl::AccessibilityGetAcceleratedWidget() {
  if (frame_tree_node()->parent() ||
      frame_tree_node()->current_frame_host() != this) {
    return gfx::kNullAcceleratedWidget;
  }

  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
      render_view_host_->GetWidget()->GetView());
  if (view)
    return view->AccessibilityGetAcceleratedWidget();
  return gfx::kNullAcceleratedWidget;
}

    RenderFrameHostImpl::AccessibilityGetAcceleratedWidget() {
  if (frame_tree_node()->parent() ||
      frame_tree_node()->current_frame_host() != this) {
    return gfx::kNullAcceleratedWidget;
  }

  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
      render_view_host_->GetWidget()->GetView());
  if (view)
    return view->AccessibilityGetAcceleratedWidget();
  return gfx::kNullAcceleratedWidget;
}
