Drag-and-drop: Target drag messages (the sequel).

content/public/browser/web_contents.h

Index: content/public/browser/web_contents.h
diff --git a/content/public/browser/web_contents.h b/content/public/browser/web_contents.h
index 34befb737019a97d6aa7f3697f4d17ff1e09a260..e450caee234fd614994daf3e38719f0bb10eff04 100644
--- a/content/public/browser/web_contents.h
+++ b/content/public/browser/web_contents.h
@@ -59,6 +59,7 @@ class PageState;
 class RenderFrameHost;
 class RenderProcessHost;
 class RenderViewHost;
+class RenderWidgetHost;
 class RenderWidgetHostView;
 class WebContentsDelegate;
 struct CustomContextMenuContext;
@@ -589,7 +590,7 @@ class WebContents : public PageNavigator,
 
   // A render view-originated drag has ended. Informs the render view host and
   // WebContentsDelegate.
-  virtual void SystemDragEnded() = 0;
+  virtual void SystemDragEnded(RenderWidgetHost* source_rwh) = 0;
 
   // Notification the user has made a gesture while focus was on the
   // page. This is used to avoid uninitiated user downloads (aka carpet