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

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

 /*
  * Copyright (C) 2012 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 "platform/wtf/PtrUtil.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebCompositorSupport.h"
 #include "public/platform/WebLayer.h"
 #include "public/platform/WebLayerTreeView.h"
 #include "public/platform/WebThread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
-class GraphicsLayerTest : public testing::Test {
+class GraphicsLayerTest : public ::testing::Test {
  public:
   GraphicsLayerTest() {
     clip_layer_ = WTF::WrapUnique(new FakeGraphicsLayer(&client_));
     scroll_elasticity_layer_ = WTF::WrapUnique(new FakeGraphicsLayer(&client_));
     page_scale_layer_ = WTF::WrapUnique(new FakeGraphicsLayer(&client_));
     graphics_layer_ = WTF::WrapUnique(new FakeGraphicsLayer(&client_));
     clip_layer_->AddChild(scroll_elasticity_layer_.get());
     scroll_elasticity_layer_->AddChild(page_scale_layer_.get());
     page_scale_layer_->AddChild(graphics_layer_.get());
     graphics_layer_->PlatformLayer()->SetScrollable(
@@ skipping 136 matching lines @@
     return Platform::Current()->CurrentThread()->Scheduler()->TimerTaskRunner();
   }
 
   DEFINE_INLINE_VIRTUAL_TRACE() { ScrollableArea::Trace(visitor); }
 
  private:
   ScrollOffset scroll_offset_;
 };
 
 }  // namespace blink