Drag-and-drop: Target drag messages to specific RenderWidgets.

content/browser/web_contents/web_contents_view_guest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/web_contents/web_contents_view_guest.h"
 
 #include <utility>
 
 #include "build/build_config.h"
 #include "content/browser/browser_plugin/browser_plugin_embedder.h"
@@ skipping 211 matching lines @@
 void WebContentsViewGuest::ShowContextMenu(RenderFrameHost* render_frame_host,
                                            const ContextMenuParams& params) {
   platform_view_delegate_view_->ShowContextMenu(render_frame_host, params);
 }
 
 void WebContentsViewGuest::StartDragging(
     const DropData& drop_data,
     WebDragOperationsMask ops,
     const gfx::ImageSkia& image,
     const gfx::Vector2d& image_offset,
-    const DragEventSourceInfo& event_info) {
+    const DragEventSourceInfo& event_info,
+    RenderWidgetHostImpl* source_rwh) {
   WebContentsImpl* embedder_web_contents = guest_->embedder_web_contents();
   embedder_web_contents->GetBrowserPluginEmbedder()->StartDrag(guest_);
   RenderViewHostImpl* embedder_render_view_host =
       static_cast<RenderViewHostImpl*>(
           embedder_web_contents->GetRenderViewHost());
   CHECK(embedder_render_view_host);
   RenderViewHostDelegateView* view =
       embedder_render_view_host->GetDelegate()->GetDelegateView();
   if (view) {
     RecordAction(base::UserMetricsAction("BrowserPlugin.Guest.StartDrag"));
-    view->StartDragging(drop_data, ops, image, image_offset, event_info);
+    view->StartDragging(
+        drop_data, ops, image, image_offset, event_info, source_rwh);
   } else {
     embedder_web_contents->SystemDragEnded();
   }
 }
 
 }  // namespace content