Fixed drag and drop into and out of Browser Plugin.

content/public/browser/web_contents.h

Index: content/public/browser/web_contents.h
diff --git a/content/public/browser/web_contents.h b/content/public/browser/web_contents.h
index 22f0fabafbb7a1f59683d2d9b18d53b61684f2fa..88f2976dd59758845b922774ab4176e8a84ab9f7 100644
--- a/content/public/browser/web_contents.h
+++ b/content/public/browser/web_contents.h
@@ -17,6 +17,7 @@
 #include "content/public/browser/web_ui.h"
 #include "ipc/ipc_sender.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
 #include "ui/base/window_open_disposition.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
@@ -345,8 +346,18 @@ class WebContents : public PageNavigator,
   // times, subsequent calls are ignored.
   virtual void OnCloseStarted() = 0;
 
-  // A render view-originated drag has ended. Informs the render view host and
-  // WebContentsDelegate.
+  // Informs the render view host and the BrowserPluginEmbedder, if present, of
+  // a Drag Source End.
+  virtual void DragSourceEndedAt(int client_x, int client_y, int screen_x,
+      int screen_y, WebKit::WebDragOperation operation) = 0;
+
+  // Informs the render view host and the BrowserPluginEmbedder, if present, of
+  // a Drag Source Move.
+  virtual void DragSourceMovedTo(int client_x, int client_y,
+                                 int screen_x, int screen_y) = 0;
+
+  // A render view-originated drag has ended. Informs the render view host, the
+  // WebContentsDelegate, and the BrowserPluginEmbedder, if present.
   virtual void SystemDragEnded() = 0;
 
   // Notification the user has made a gesture while focus was on the