content: Move MockWebClipboardImpl into content namespace.

content/test/mock_webclipboard_impl.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.
 //
 // This file mocks out just enough of the WebClipboard API for running the
 // webkit tests. This is so we can run webkit tests without them sharing a
 // clipboard, which allows for running them in parallel and having the tests
 // not interact with actual user actions.
 
 #ifndef CONTENT_TEST_MOCK_WEBCLIPBOARD_IMPL_H_
 #define CONTENT_TEST_MOCK_WEBCLIPBOARD_IMPL_H_
 
 #include <map>
 
 #include "base/strings/string16.h"
 #include "third_party/WebKit/public/platform/WebClipboard.h"
 #include "third_party/WebKit/public/platform/WebDragData.h"
 #include "third_party/WebKit/public/platform/WebImage.h"
 
+namespace content {
+
 class MockWebClipboardImpl : public WebKit::WebClipboard {
  public:
   MockWebClipboardImpl();
   virtual ~MockWebClipboardImpl();
 
   virtual bool isFormatAvailable(WebKit::WebClipboard::Format format,
                                  WebKit::WebClipboard::Buffer buffer);
   virtual WebKit::WebVector<WebKit::WebString> readAvailableTypes(
       WebKit::WebClipboard::Buffer buffer, bool* containsFilenames);
 
@@ skipping 20 matching lines @@
  private:
   void clear();
 
   WebKit::WebString m_plainText;
   WebKit::WebString m_htmlText;
   WebKit::WebImage m_image;
   std::map<base::string16, base::string16> m_customData;
   bool m_writeSmartPaste;
 };
 
+}  // namespace content
+
 #endif  // CONTENT_TEST_MOCK_WEBCLIPBOARD_IMPL_H_