Cleanup namespace usage from animation to exported in platform/

Source/platform/exported/WebThreadSafeData.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "public/platform/WebThreadSafeData.h"
 
 #include "platform/blob/BlobData.h"
 
-using namespace blink;
-
 namespace blink {
 
 void WebThreadSafeData::reset()
 {
     m_private.reset();
 }
 
 void WebThreadSafeData::assign(const WebThreadSafeData& other)
 {
     m_private = other.m_private;
@@ skipping 18 matching lines @@
 {
 }
 
 WebThreadSafeData& WebThreadSafeData::operator=(const PassRefPtr<RawData>& data)
 {
     m_private = data;
     return *this;
 }
 
 } // namespace blink