Update WebClipboard/WebDropData glue to use new getter/setter for WebDragData.

ui/base/clipboard/clipboard.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_BASE_CLIPBOARD_CLIPBOARD_H_
 #define UI_BASE_CLIPBOARD_CLIPBOARD_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 23 matching lines @@
 #ifdef __OBJC__
 @class NSString;
 #else
 class NSString;
 #endif
 
 namespace ui {
 
 class UI_EXPORT Clipboard {
  public:
+  // MIME type constants.
+  static const char kMimeTypeText[];
+  static const char kMimeTypeURIList[];
+  static const char kMimeTypeDownloadURL[];
+  static const char kMimeTypeHTML[];
+  static const char kMimeTypePNG[];
+
   // Platform neutral holder for native data representation of a clipboard type.
   struct UI_EXPORT FormatType {
     FormatType();
     ~FormatType();
 
     std::string Serialize() const;
     static FormatType Deserialize(const std::string& serialization);
 
    private:
     friend class Clipboard;
@@ skipping 262 matching lines @@
   void InsertMapping(const char* key, char* data, size_t data_len);
 
   // Find the gtk clipboard for the passed buffer enum.
   GtkClipboard* LookupBackingClipboard(Buffer clipboard) const;
 
   TargetMap* clipboard_data_;
   GtkClipboard* clipboard_;
   GtkClipboard* primary_selection_;
 #endif
 
-  // MIME type constants.
-  static const char kMimeTypeText[];
-  static const char kMimeTypeHTML[];
-  static const char kMimeTypePNG[];
-
   DISALLOW_COPY_AND_ASSIGN(Clipboard);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_CLIPBOARD_CLIPBOARD_H_