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

third_party/WebKit/Source/core/layout/compositing/CompositedLayerMappingTest.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 "core/layout/compositing/CompositedLayerMapping.h"
 
 #include "core/frame/LocalFrameView.h"
 #include "core/layout/LayoutBoxModelObject.h"
 #include "core/layout/LayoutTestHelper.h"
 #include "core/layout/api/LayoutViewItem.h"
 #include "core/paint/PaintLayer.h"
 #include "platform/testing/RuntimeEnabledFeaturesTestHelpers.h"
 #include "public/platform/WebContentLayer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 typedef bool TestParamRootLayerScrolling;
 class CompositedLayerMappingTest
-    : public testing::WithParamInterface<TestParamRootLayerScrolling>,
+    : public ::testing::WithParamInterface<TestParamRootLayerScrolling>,
       private ScopedRootLayerScrollingForTest,
       public RenderingTest {
  public:
   CompositedLayerMappingTest()
       : ScopedRootLayerScrollingForTest(GetParam()),
         RenderingTest(SingleChildLocalFrameClient::Create()) {}
 
  protected:
   IntRect RecomputeInterestRect(const GraphicsLayer* graphics_layer) {
     return static_cast<CompositedLayerMapping*>(graphics_layer->Client())
@@ skipping 1880 matching lines @@
   ASSERT_TRUE(target && target->IsBox());
   PaintLayer* target_layer = ToLayoutBox(target)->Layer();
   GraphicsLayer* target_graphics_layer =
       target_layer ? target_layer->GraphicsLayerBacking() : nullptr;
   ASSERT_TRUE(target_graphics_layer);
   EXPECT_TRUE(
       target_graphics_layer->ContentLayer()->TransformedRasterizationAllowed());
 }
 
 }  // namespace blink