Dragging shouldn't block interstitial page.

content/browser/frame_host/interstitial_page_impl.cc

Index: content/browser/frame_host/interstitial_page_impl.cc
diff --git a/content/browser/frame_host/interstitial_page_impl.cc b/content/browser/frame_host/interstitial_page_impl.cc
index 10f99b4eadc3586208c6768500a0ec1ef3fdfff2..69e2e9b5fecbeb9e033b95ab281635b4b4191169 100644
--- a/content/browser/frame_host/interstitial_page_impl.cc
+++ b/content/browser/frame_host/interstitial_page_impl.cc
@@ -873,6 +873,7 @@ void InterstitialPageImpl::InterstitialPageRVHDelegateView::StartDragging(
     const gfx::ImageSkia& image,
     const gfx::Vector2d& image_offset,
     const DragEventSourceInfo& event_info) {
+  interstitial_page_->render_view_host_->DragSourceSystemDragEnded();

[dcheng, 2014/04/25 18:25:11]

Should this be calling web_contents_->SystemDragEnded() instead?

   NOTREACHED() << "InterstitialPage does not support dragging yet.";

[Charlie Reis, 2014/04/28 17:31:30]

Wait, this isn't ok to land.  NOTREACHED implies we can't get here, but
obviously we can.  This shouldn't be here.

 }