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

content/browser/web_contents/web_contents_view_mac.h

 // 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.
 
 #ifndef CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_MAC_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include <memory>
@@ skipping 97 matching lines @@
                      double item_font_size,
                      int selected_item,
                      const std::vector<MenuItem>& items,
                      bool right_aligned,
                      bool allow_multiple_selection) override;
   void HidePopupMenu() override;
   void StartDragging(const DropData& drop_data,
                      blink::WebDragOperationsMask allowed_operations,
                      const gfx::ImageSkia& image,
                      const gfx::Vector2d& image_offset,
-                     const DragEventSourceInfo& event_info) override;
+                     const DragEventSourceInfo& event_info,
+                     RenderWidgetHostImpl* source_rwh) override;
   void UpdateDragCursor(blink::WebDragOperation operation) override;
   void GotFocus() override;
   void TakeFocus(bool reverse) override;
 
   // A helper method for closing the tab in the
   // CloseTabAfterEventTracking() implementation.
   void CloseTab();
 
   WebContentsImpl* web_contents() { return web_contents_; }
   WebContentsViewDelegate* delegate() { return delegate_.get(); }
@@ skipping 21 matching lines @@
   bool allow_other_views_;
 
   std::unique_ptr<PopupMenuHelper> popup_menu_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsViewMac);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_MAC_H_