Rename WebKit namespace to blink (part 3)

content/renderer/drop_data_builder.h

 // Copyright 2013 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_RENDERER_DROP_DATA_BUILDER_H_
 #define CONTENT_RENDERER_DROP_DATA_BUILDER_H_
 
-namespace WebKit {
+namespace blink {
 class WebDragData;
 }
 
 namespace content {
 struct DropData;
 
 class DropDataBuilder {
  public:
-  static DropData Build(const WebKit::WebDragData& data);
+  static DropData Build(const blink::WebDragData& data);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_DROP_DATA_BUILDER_H_