Cleanup namespace usage from animation to exported in platform/

Source/platform/exported/WebMediaStream.cpp

Index: Source/platform/exported/WebMediaStream.cpp
diff --git a/Source/platform/exported/WebMediaStream.cpp b/Source/platform/exported/WebMediaStream.cpp
index bdc7fa83491bc8135bdb686d96682f3d080f2622..7ead4c231ef1bd1044035f8ec08ee482abbcfdee 100644
--- a/Source/platform/exported/WebMediaStream.cpp
+++ b/Source/platform/exported/WebMediaStream.cpp
@@ -37,8 +37,6 @@
 #include "wtf/PassOwnPtr.h"
 #include "wtf/Vector.h"
 
-using namespace blink;
-
 namespace blink {
 
 namespace {
@@ -55,12 +53,12 @@ private:
 
 } // namespace
 
-WebMediaStream::WebMediaStream(const PassRefPtr<blink::MediaStreamDescriptor>& mediaStreamDescriptor)
+WebMediaStream::WebMediaStream(const PassRefPtr<MediaStreamDescriptor>& mediaStreamDescriptor)
     : m_private(mediaStreamDescriptor)
 {
 }
 
-WebMediaStream::WebMediaStream(blink::MediaStreamDescriptor* mediaStreamDescriptor)
+WebMediaStream::WebMediaStream(MediaStreamDescriptor* mediaStreamDescriptor)
     : m_private(mediaStreamDescriptor)
 {
 }
@@ -118,18 +116,18 @@ void WebMediaStream::removeTrack(const WebMediaStreamTrack& track)
     m_private->removeRemoteTrack(track);
 }
 
-WebMediaStream& WebMediaStream::operator=(const PassRefPtr<blink::MediaStreamDescriptor>& mediaStreamDescriptor)
+WebMediaStream& WebMediaStream::operator=(const PassRefPtr<MediaStreamDescriptor>& mediaStreamDescriptor)
 {
     m_private = mediaStreamDescriptor;
     return *this;
 }
 
-WebMediaStream::operator PassRefPtr<blink::MediaStreamDescriptor>() const
+WebMediaStream::operator PassRefPtr<MediaStreamDescriptor>() const
 {
     return m_private.get();
 }
 
-WebMediaStream::operator blink::MediaStreamDescriptor*() const
+WebMediaStream::operator MediaStreamDescriptor*() const
 {
     return m_private.get();
 }