Fixed drag and drop into and out of Browser Plugin.

content/browser/browser_plugin/browser_plugin_embedder.h

Index: content/browser/browser_plugin/browser_plugin_embedder.h
diff --git a/content/browser/browser_plugin/browser_plugin_embedder.h b/content/browser/browser_plugin/browser_plugin_embedder.h
index b8450070f171e9a4aa3d27813860789e82f3680d..5850e00f747f1844da775a487801a674de5a418e 100644
--- a/content/browser/browser_plugin/browser_plugin_embedder.h
+++ b/content/browser/browser_plugin/browser_plugin_embedder.h
@@ -101,6 +101,12 @@ class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver,
                        const NotificationSource& source,
                        const NotificationDetails& details) OVERRIDE;
 
+  void DragEnteredGuest(BrowserPluginGuest* guest);
+
+  void DragLeftGuest(BrowserPluginGuest* guest);
+
+  void StartDrag(BrowserPluginGuest* guest);
+
  private:
   friend class TestBrowserPluginEmbedder;
 
@@ -131,6 +137,12 @@ class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver,
                         const std::string& mailbox_name,
                         uint32 sync_point);
 
+  // Returns the guest browser plugin delegate that is currently dragging.
+  BrowserPluginGuest* GetDraggingGuest() const;
+
+  // Returns true if there is a guest currently being dragged over.
+  bool IsDragOverGuest() const;
+
   // Static factory instance (always NULL for non-test).
   static BrowserPluginHostFactory* factory_;
 
@@ -151,6 +163,8 @@ class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver,
   // Next request id for BrowserPluginMsg_PluginAtPositionRequest query.
   int next_get_render_view_request_id_;
   int next_instance_id_;
+  BrowserPluginGuest* guest_dragging_over;
+  BrowserPluginGuest* guest_started_drag;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedder);
 };