Fix crash where a RenderWidgetHost can be deleted in the middle of a

content/browser/web_contents/web_contents_view_aura.h

Index: content/browser/web_contents/web_contents_view_aura.h
diff --git a/content/browser/web_contents/web_contents_view_aura.h b/content/browser/web_contents/web_contents_view_aura.h
index d032f18620cd7d50b624759801efa2fde9e192d0..68690959d5a6cf6b427f931f0ea78f704f68d0a4 100644
--- a/content/browser/web_contents/web_contents_view_aura.h
+++ b/content/browser/web_contents/web_contents_view_aura.h
@@ -66,7 +66,7 @@ class CONTENT_EXPORT WebContentsViewAura
 
   void SizeChangedCommon(const gfx::Size& size);
 
-  void EndDrag(blink::WebDragOperationsMask ops);
+  void EndDrag(RenderWidgetHost* source_rwh, blink::WebDragOperationsMask ops);
 
   void InstallOverscrollControllerDelegate(RenderWidgetHostViewAura* view);
 
@@ -203,10 +203,6 @@ class CONTENT_EXPORT WebContentsViewAura
   // view. |current_rvh_for_drag_| should not be dereferenced.
   void* current_rvh_for_drag_;
 
-  // We keep track of the RenderWidgetHost from which the current drag started,
-  // in order to properly route the drag end message to it.
-  base::WeakPtr<RenderWidgetHostImpl> drag_start_rwh_;
-
   // The overscroll gesture currently in progress.
   OverscrollMode current_overscroll_gesture_;