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 ddcf6f1fbea001b9fc37cebece4ef7fc76f6be1f..d3ca10ceff26a99aa2896d6d217952bda78c0abf 100644
--- a/content/browser/browser_plugin/browser_plugin_embedder.h
+++ b/content/browser/browser_plugin/browser_plugin_embedder.h
@@ -16,6 +16,7 @@
 
 #include <map>
 
+#include "base/memory/weak_ptr.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_observer.h"
 
@@ -28,6 +29,7 @@ class Point;
 
 namespace content {
 
+class BrowserPluginGuest;
 class BrowserPluginGuestManager;
 class BrowserPluginHostFactory;
 class WebContentsImpl;
@@ -55,6 +57,23 @@ class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver {
   // WebContentsObserver implementation.
   virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+  virtual void SystemDragEnded() OVERRIDE;
+
+  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);
+
+  void OnUpdateDragCursor(bool* handled);
+
+  void DragEnteredGuest(BrowserPluginGuest* guest);
+
+  void DragLeftGuest(BrowserPluginGuest* guest);
+
+  void StartDrag(BrowserPluginGuest* guest);
+
+  void StopDrag(BrowserPluginGuest* guest);
 
  private:
   friend class TestBrowserPluginEmbedder;
@@ -87,6 +106,8 @@ class CONTENT_EXPORT BrowserPluginEmbedder : public WebContentsObserver {
   GetRenderViewHostCallbackMap pending_get_render_view_callbacks_;
   // Next request id for BrowserPluginMsg_PluginAtPositionRequest query.
   int next_get_render_view_request_id_;
+  base::WeakPtr<BrowserPluginGuest> guest_dragging_over_;
+  base::WeakPtr<BrowserPluginGuest> guest_started_drag_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedder);
 };