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 f0b3039019282c15f0822198145f4d4ffb08597c..2d6a9ac8280eb8f15caa196d2bb84cd056a7eebf 100644
--- a/content/browser/browser_plugin/browser_plugin_guest.h
+++ b/content/browser/browser_plugin/browser_plugin_guest.h
@@ -25,6 +25,7 @@
 
 #include "base/compiler_specific.h"
 #include "base/id_map.h"
+#include "base/memory/weak_ptr.h"
 #include "base/shared_memory.h"
 #include "base/time.h"
 #include "content/port/common/input_event_ack_state.h"
@@ -57,6 +58,7 @@ namespace content {
 
 class BrowserPluginHostFactory;
 class BrowserPluginEmbedder;
+class DragEventSourceInfo;
 class RenderProcessHost;
 
 // A browser plugin guest provides functionality for WebContents to operate in
@@ -64,9 +66,11 @@ class RenderProcessHost;
 // messages.
 //
 // BrowserPluginEmbedder is responsible for creating and destroying a 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:
   virtual ~BrowserPluginGuest();
 
@@ -260,6 +264,7 @@ class CONTENT_EXPORT BrowserPluginGuest : public NotificationObserver,
                       int* route_id,
                       int* surface_id,
                       int64* cloned_session_storage_namespace_id);
+  void OnDragStopped();
   void OnHandleInputEventAck(
       WebKit::WebInputEvent::Type event_type,
       InputEventAckState ack_result);
@@ -271,9 +276,9 @@ class CONTENT_EXPORT BrowserPluginGuest : public NotificationObserver,
   void OnShowPopup(const ViewHostMsg_ShowPopup_Params& params);
 #endif
   void OnShowWidget(int route_id, const gfx::Rect& initial_pos);
+  void OnStartDragging(bool* handled);
   // 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);