Get drag and drop working for win aura.

ui/views/controls/webview/webview.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_CONTROLS_WEBVIEW_WEBVIEW_H_
 #define UI_VIEWS_CONTROLS_WEBVIEW_WEBVIEW_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/notification_observer.h"
@@ skipping 77 matching lines @@
                                     View* parent,
                                     View* child) OVERRIDE;
   virtual bool SkipDefaultKeyEventProcessing(
       const ui::KeyEvent& event) OVERRIDE;
   virtual bool IsFocusable() const OVERRIDE;
   virtual void OnFocus() OVERRIDE;
   virtual void AboutToRequestFocusFromTabTraversal(bool reverse) OVERRIDE;
   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,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // Overridden from content::WebContentsDelegate:
   virtual void WebContentsFocused(content::WebContents* web_contents) OVERRIDE;
 
   void AttachWebContents();
@@ skipping 16 matching lines @@
   content::NotificationRegistrar registrar_;
   bool allow_accelerators_;
   gfx::Size preferred_size_;
 
   DISALLOW_COPY_AND_ASSIGN(WebView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_WEBVIEW_WEBVIEW_H_