Be explicit about namespace testing to not mix it with blink::testing

third_party/WebKit/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 35 matching lines @@
 #include "public/platform/WebThread.h"
 #include "public/platform/WebTraceLocation.h"
 #include "skia/ext/texture_handle.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkSurface.h"
 #include "third_party/skia/include/gpu/gl/GrGLTypes.h"
 
 #include <memory>
 
-using testing::AnyNumber;
-using testing::AtLeast;
-using testing::InSequence;
-using testing::Return;
-using testing::Test;
-using testing::_;
+using ::testing::AnyNumber;
+using ::testing::AtLeast;
+using ::testing::InSequence;
+using ::testing::Return;
+using ::testing::Test;
+using ::testing::_;
 
 namespace blink {
 
 namespace {
 
 class Canvas2DLayerBridgePtr {
  public:
   Canvas2DLayerBridgePtr() {}
   Canvas2DLayerBridgePtr(PassRefPtr<Canvas2DLayerBridge> layer_bridge)
       : layer_bridge_(std::move(layer_bridge)) {}
@@ skipping 1306 matching lines @@
   EXPECT_FALSE(bridge->HasRecordedDrawCommands());
   ::testing::Mock::VerifyAndClearExpectations(&gl);
 
   EXPECT_CALL(gl, Flush()).Times(1);
   bridge->FlushGpu();
   EXPECT_FALSE(bridge->HasRecordedDrawCommands());
   ::testing::Mock::VerifyAndClearExpectations(&gl);
 }
 
 }  // namespace blink