Fixed drag and drop into and out of Browser Plugin.

content/browser/browser_plugin/browser_plugin_guest.h

Index: content/browser/browser_plugin/browser_plugin_guest.h
diff --git a/content/browser/browser_plugin/browser_plugin_guest.h b/content/browser/browser_plugin/browser_plugin_guest.h
index 2bbf2f22185988d2548c2a06a7f08f23bf57ef04..45e500be1854fe84773e79c8865041a9995ba29a 100644
--- a/content/browser/browser_plugin/browser_plugin_guest.h
+++ b/content/browser/browser_plugin/browser_plugin_guest.h
@@ -79,9 +79,11 @@ struct MediaStreamRequest;
 // A BrowserPluginGuest can also create a new unattached guest via
 // CreateNewWindow. The newly created guest will live in the same partition,
 // which means it can share storage and can script this guest.
-class CONTENT_EXPORT BrowserPluginGuest : public NotificationObserver,
-                                          public WebContentsDelegate,
-                                          public WebContentsObserver {
+class CONTENT_EXPORT BrowserPluginGuest
+    : public NotificationObserver,
+      public WebContentsDelegate,
+      public WebContentsObserver,
+      public base::SupportsWeakPtr<BrowserPluginGuest> {
  public:
   typedef base::Callback<void(bool)> GeolocationCallback;
   virtual ~BrowserPluginGuest();
@@ -238,6 +240,15 @@ class CONTENT_EXPORT BrowserPluginGuest : public NotificationObserver,
   // |message|.
   static bool ShouldForwardToBrowserPluginGuest(const IPC::Message& message);
 
+  void DragSourceEndedAt(int client_x, int client_y, int screen_x,
+      int screen_y, WebKit::WebDragOperation operation);
+
+  void DragSourceMovedTo(int client_x, int client_y,
+                         int screen_x, int screen_y);
+
+  // Called when the drag started by this guest ends at an OS-level.
+  void EndSystemDrag();
+
  private:
   typedef std::pair<MediaStreamRequest, MediaResponseCallback>
       MediaStreamRequestAndCallbackPair;
@@ -363,6 +374,7 @@ class CONTENT_EXPORT BrowserPluginGuest : public NotificationObserver,
 
   // Message handlers for messages from guest.
 
+  void OnDragStopped();
   void OnHandleInputEventAck(
       WebKit::WebInputEvent::Type event_type,
       InputEventAckState ack_result);
@@ -376,7 +388,6 @@ class CONTENT_EXPORT BrowserPluginGuest : public NotificationObserver,
   void OnShowWidget(int route_id, const gfx::Rect& initial_pos);
   // Overriden in tests.
   virtual void OnTakeFocus(bool reverse);
-  void OnUpdateDragCursor(WebKit::WebDragOperation operation);
   void OnUpdateFrameName(int frame_id,
                          bool is_top_level,
                          const std::string& name);