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

third_party/WebKit/Source/platform/graphics/RecordingImageBufferSurfaceTest.cpp

 // Copyright 2014 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.
 
 #include "platform/graphics/RecordingImageBufferSurface.h"
 
 #include <memory>
 #include "platform/WebTaskRunner.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/ImageBuffer.h"
 #include "platform/graphics/ImageBufferClient.h"
 #include "platform/graphics/UnacceleratedImageBufferSurface.h"
 #include "platform/graphics/paint/PaintCanvas.h"
 #include "platform/graphics/paint/PaintRecord.h"
 #include "platform/testing/TestingPlatformSupport.h"
 #include "platform/wtf/PtrUtil.h"
 #include "platform/wtf/RefPtr.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebThread.h"
 #include "public/platform/WebTraceLocation.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using testing::Test;
+using ::testing::Test;
 
 namespace blink {
 
 class RecordingImageBufferSurfaceTest : public Test {
  protected:
   RecordingImageBufferSurfaceTest() {
     auto test_surface = WTF::MakeUnique<RecordingImageBufferSurface>(
         IntSize(10, 10), RecordingImageBufferSurface::kAllowFallback,
         kNonOpaque);
     test_surface_ = test_surface.get();
@@ skipping 61 matching lines @@
   clear_flags.setBlendMode(SkBlendMode::kClear);
   Canvas()->drawRect(SkRect::MakeWH(TestSurface()->size().Width(),
                                     TestSurface()->size().Height()),
                      clear_flags);
   TestSurface()->DidDraw(FloatRect(0, 0, 1, 1));
   TestSurface()->GetRecord();
   EXPECT_TRUE(TestSurface()->IsRecording());
 }
 
 }  // namespace blink