Cleanup namespace usage in platform/graphics/[filters/* to skia/*] and platform/graphics/[B-D]*

Source/platform/graphics/Canvas2DLayerBridgeTest.cpp

 /*
  * Copyright (C) 2011 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 23 matching lines @@
 #include "public/platform/WebExternalBitmap.h"
 #include "public/platform/WebGraphicsContext3DProvider.h"
 #include "public/platform/WebThread.h"
 #include "third_party/skia/include/core/SkDevice.h"
 #include "wtf/RefPtr.h"
 
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 
 using namespace blink;
-using namespace blink;
 using testing::InSequence;
 using testing::Return;
 using testing::Test;
 
 namespace {
 
 class MockCanvasContext : public MockWebGraphicsContext3D {
 public:
     MOCK_METHOD0(flush, void(void));
     MOCK_METHOD0(createTexture, unsigned(void));
@@ skipping 102 matching lines @@
 {
     fullLifecycleTest();
 }
 
 TEST_F(Canvas2DLayerBridgeTest, prepareMailboxWithBitmapTest)
 {
     prepareMailboxWithBitmapTest();
 }
 
 } // namespace