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..7e9559ad963b948b209e86a5669592464fd8ff71 100644
--- a/content/browser/browser_plugin/browser_plugin_embedder.h
+++ b/content/browser/browser_plugin/browser_plugin_embedder.h
@@ -22,6 +22,7 @@
 
 #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"
@@ -96,11 +97,20 @@ class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver,
   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;
 
@@ -151,6 +161,8 @@ class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver,
   // Next request id for BrowserPluginMsg_PluginAtPositionRequest query.
   int next_get_render_view_request_id_;
   int next_instance_id_;
+  base::WeakPtr<BrowserPluginGuest> guest_dragging_over_;
+  base::WeakPtr<BrowserPluginGuest> guest_started_drag_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedder);
 };