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

third_party/WebKit/Source/core/paint/PaintControllerPaintTest.h

 // Copyright 2015 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.
 
 #ifndef PaintControllerPaintTest_h
 #define PaintControllerPaintTest_h
 
 #include <gtest/gtest.h>
 #include "core/frame/LocalFrameView.h"
 #include "core/layout/LayoutTestHelper.h"
@@ skipping 78 matching lines @@
   }
 };
 
 class PaintControllerPaintTest : public PaintControllerPaintTestBase {
  public:
   PaintControllerPaintTest() : PaintControllerPaintTestBase(false) {}
 };
 
 class PaintControllerPaintTestForSlimmingPaintV2
     : public PaintControllerPaintTestBase,
-      public testing::WithParamInterface<bool>,
+      public ::testing::WithParamInterface<bool>,
       private ScopedRootLayerScrollingForTest {
  public:
   PaintControllerPaintTestForSlimmingPaintV2()
       : PaintControllerPaintTestBase(true),
         ScopedRootLayerScrollingForTest(GetParam()) {}
 };
 
 class PaintControllerPaintTestForSlimmingPaintV1AndV2
     : public PaintControllerPaintTestBase,
-      public testing::WithParamInterface<bool> {
+      public ::testing::WithParamInterface<bool> {
  public:
   PaintControllerPaintTestForSlimmingPaintV1AndV2()
       : PaintControllerPaintTestBase(GetParam()) {}
 };
 
 class TestDisplayItem final : public DisplayItem {
  public:
   TestDisplayItem(const DisplayItemClient& client, Type type)
       : DisplayItem(client, type, sizeof(*this)) {}
 
@@ skipping 27 matching lines @@
 // Shorter names for frequently used display item types in tests.
 const DisplayItem::Type kBackgroundType = DisplayItem::kBoxDecorationBackground;
 const DisplayItem::Type kForegroundType =
     DisplayItem::PaintPhaseToDrawingType(kPaintPhaseForeground);
 const DisplayItem::Type kDocumentBackgroundType =
     DisplayItem::kDocumentBackground;
 
 }  // namespace blink
 
 #endif  // PaintControllerPaintTest_h