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

third_party/WebKit/Source/platform/fonts/OrientationIteratorTest.cpp

 // 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.
 
 #include "platform/fonts/OrientationIterator.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include <string>
 
 namespace blink {
 
 struct TestRun {
   std::string text;
   OrientationIterator::RenderOrientation code;
 };
 
 struct ExpectedRun {
   unsigned limit;
   OrientationIterator::RenderOrientation render_orientation;
 
   ExpectedRun(unsigned the_limit,
               OrientationIterator::RenderOrientation the_render_orientation)
       : limit(the_limit), render_orientation(the_render_orientation) {}
 };
 
-class OrientationIteratorTest : public testing::Test {
+class OrientationIteratorTest : public ::testing::Test {
  protected:
   void CheckRuns(const Vector<TestRun>& runs) {
     String text(g_empty_string16_bit);
     Vector<ExpectedRun> expect;
     for (auto& run : runs) {
       text.append(String::FromUTF8(run.text.c_str()));
       expect.push_back(ExpectedRun(text.length(), run.code));
     }
     OrientationIterator orientation_iterator(text.Characters16(), text.length(),
                                              FontOrientation::kVerticalMixed);
@@ skipping 117 matching lines @@
   CHECK_RUNS({{"Abc", OrientationIterator::kOrientationRotateSideways},
               {"ほへと", OrientationIterator::kOrientationKeep},
               {"Xyz", OrientationIterator::kOrientationRotateSideways}});
 }
 
 TEST_F(OrientationIteratorTest, JapaneseMahjonggMixed) {
   CHECK_RUNS({{"いろはに🀤ほへと", OrientationIterator::kOrientationKeep}});
 }
 
 }  // namespace blink