Get drag and drop working for win aura.

ui/views/controls/webview/webview.h

Index: ui/views/controls/webview/webview.h
===================================================================
--- ui/views/controls/webview/webview.h	(revision 171329)
+++ ui/views/controls/webview/webview.h	(working copy)
@@ -9,11 +9,14 @@
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
-#include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "ui/views/controls/webview/webview_export.h"
 #include "ui/views/view.h"
 
+namespace content {
+class SiteInstance;
+}
+
 namespace views {
 
 class NativeViewHost;
@@ -92,6 +95,13 @@
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
   virtual gfx::NativeViewAccessible GetNativeViewAccessible() OVERRIDE;
   virtual gfx::Size GetPreferredSize() OVERRIDE;
+#if defined(USE_AURA)
+  virtual bool CanDrop(const ui::OSExchangeData& data) OVERRIDE;
+  virtual void OnDragEntered(const ui::DropTargetEvent& event) OVERRIDE;
+  virtual int OnDragUpdated(const ui::DropTargetEvent& event) OVERRIDE;
+  virtual void OnDragExited() OVERRIDE;
+  virtual int OnPerformDrop(const ui::DropTargetEvent& event) OVERRIDE;
+#endif
 
   // Overridden from content::NotificationObserver:
   virtual void Observe(int type,