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

third_party/WebKit/Source/platform/graphics/gpu/WebGLImageConversionTest.cpp

 // Copyright 2016 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/gpu/WebGLImageConversion.h"
 
 #include "build/build_config.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
-class WebGLImageConversionTest : public testing::Test {
+class WebGLImageConversionTest : public ::testing::Test {
  protected:
   void UnpackPixels(const uint16_t* source_data,
                     WebGLImageConversion::DataFormat source_data_format,
                     unsigned pixels_per_row,
                     uint8_t* destination_data) {
     WebGLImageConversion::UnpackPixels(source_data, source_data_format,
                                        pixels_per_row, destination_data);
   }
   void PackPixels(const uint8_t* source_data,
                   WebGLImageConversion::DataFormat source_data_format,
@@ skipping 141 matching lines @@
   uint16_t expected_data[10] = {0x32a6, 0x32a6, 0x32a6, 0x32a6, 0x32a6,
                                 0x32a6, 0x32a6, 0x32a6, 0x32a6, 0x32a6};
   uint16_t destination_data[10];
   PackPixels(source_data, WebGLImageConversion::kDataFormatRGB565, 10,
              reinterpret_cast<uint8_t*>(&destination_data[0]));
   EXPECT_EQ(0,
             memcmp(expected_data, destination_data, sizeof(destination_data)));
 }
 
 }  // namespace blink