Tweak the WebDragDestDelegate to be useful for more than GTK.

content/browser/tab_contents/web_drag_dest_delegate.h

 // Copyright (c) 2011 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 CONTENT_BROWSER_TAB_CONTENTS_WEB_DRAG_DEST_DELEGATE_GTK_H_
-#define CONTENT_BROWSER_TAB_CONTENTS_WEB_DRAG_DEST_DELEGATE_GTK_H_
+#ifndef CONTENT_BROWSER_TAB_CONTENTS_WEB_DRAG_DEST_DELEGATE_H_
+#define CONTENT_BROWSER_TAB_CONTENTS_WEB_DRAG_DEST_DELEGATE_H_
 #pragma once
 
+#if defined(TOOLKIT_USES_GTK)
 #include <gtk/gtk.h>
+#endif  // TOOLKIT_USES_GTK
 
 #include "base/string16.h"
 #include "content/common/content_export.h"
 
 class GURL;
 class TabContents;
 
 namespace content {
 
 // An optional delegate that listens for drags of bookmark data.
-class CONTENT_EXPORT WebDragDestDelegateGtk {
+class CONTENT_EXPORT WebDragDestDelegate {
  public:
   // Announces that a drag has started. It's valid that a drag starts, along
   // with over/enter/leave/drop notifications without receiving any bookmark
   // data.
   virtual void DragInitialize(TabContents* contents) = 0;
 
+  // Notifications of drag progression.
+  virtual void OnDragOver() = 0;
+  virtual void OnDragEnter() = 0;
+  virtual void OnDrop() = 0;
+
+#if defined(TOOLKIT_USES_GTK)
   // Returns the bookmark atom type. GTK and Views return different values here.
   virtual GdkAtom GetBookmarkTargetAtom() const = 0;
 
   // Called when WebDragDestkGtk detects that there's bookmark data in a
   // drag. Not every drag will trigger these.
   virtual void OnReceiveDataFromGtk(GtkSelectionData* data) = 0;
   virtual void OnReceiveProcessedData(const GURL& url,
                                       const string16& title) = 0;
-
-  // Notifications of drag progression.
-  virtual void OnDragOver() = 0;
-  virtual void OnDragEnter() = 0;
-  virtual void OnDrop() = 0;
+#endif  // TOOLKIT_USES_GTK
 
   // This should also clear any state kept about this drag.
   virtual void OnDragLeave() = 0;
 
-  virtual ~WebDragDestDelegateGtk() {}
+  virtual ~WebDragDestDelegate() {}
 };
 
 }  // namespace content
 
-#endif  // CONTENT_BROWSER_TAB_CONTENTS_WEB_DRAG_DEST_DELEGATE_GTK_H_
+#endif  // CONTENT_BROWSER_TAB_CONTENTS_WEB_DRAG_DEST_DELEGATE_H_