Fixed drag and drop into and out of Browser Plugin.

content/browser/browser_plugin/browser_plugin_embedder.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.
 
 // A BrowserPluginEmbedder has a list of guests it manages.
 // In the beginning when a renderer sees one or more guests (BrowserPlugin
 // instance(s)) and there is a request to navigate to them, the WebContents for
 // that renderer creates a BrowserPluginEmbedder for itself. The
 // BrowserPluginEmbedder, in turn, manages a set of BrowserPluginGuests -- one
 // BrowserPluginGuest for each guest in the embedding WebContents. Note that
 // each of these BrowserPluginGuest objects has its own WebContents.
 // BrowserPluginEmbedder routes any messages directed to a guest from the
 // renderer (BrowserPlugin) to the appropriate guest (identified by the guest's
 // |instance_id|).
 //
 // BrowserPluginEmbedder is responsible for cleaning up the guests when the
 // embedder frame navigates away to a different page or deletes the guests from
 // the existing page.
 
 #ifndef CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_
 #define CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_
 
 #include <map>
 
+#include "base/memory/weak_ptr.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_observer.h"
 
 struct BrowserPluginHostMsg_CreateGuest_Params;
 struct BrowserPluginHostMsg_ResizeGuest_Params;
 
 namespace gfx {
 class Point;
@@ skipping 54 matching lines @@
   void GetRenderViewHostAtPosition(
       int x,
       int y,
       const WebContents::GetRenderViewHostCallback& callback);
 
   // WebContentsObserver implementation.
   virtual void RenderViewDeleted(RenderViewHost* render_view_host) OVERRIDE;
   virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
+  void OnDragStopped(const IPC::Message& message, bool* handled);
+  void OnUpdateDragCursor(bool* handled);
+
   // NotificationObserver method override.
   virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details) OVERRIDE;
 
+  void DragEnteredGuest(BrowserPluginGuest* guest);
+
+  void DragLeftGuest(BrowserPluginGuest* guest);
+
+  void StartDrag(BrowserPluginGuest* guest);
+
  private:
   friend class TestBrowserPluginEmbedder;
 
   BrowserPluginEmbedder(WebContentsImpl* web_contents,
                         RenderViewHost* render_view_host);
 
   // Adds a new guest web_contents to the embedder (overridable in test).
   virtual void AddGuest(int instance_id, WebContents* guest_web_contents);
   void CleanUp();
 
@@ skipping 30 matching lines @@
   bool visible_;
   // Map that contains outstanding queries to |GetBrowserPluginAt|.
   // We need a roundtrip to renderer process to know the answer, therefore
   // storing these callbacks is required.
   typedef std::map<int, WebContents::GetRenderViewHostCallback>
       GetRenderViewHostCallbackMap;
   GetRenderViewHostCallbackMap pending_get_render_view_callbacks_;
   // Next request id for BrowserPluginMsg_PluginAtPositionRequest query.
   int next_get_render_view_request_id_;
   int next_instance_id_;
+  base::WeakPtr<BrowserPluginGuest> guest_dragging_over_;
+  base::WeakPtr<BrowserPluginGuest> guest_started_drag_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedder);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_