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

third_party/WebKit/Source/web/tests/WebFrameTest.cpp

 /*
  * Copyright (C) 2010 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 150 matching lines @@
 #include "public/web/WebTextCheckingCompletion.h"
 #include "public/web/WebTextCheckingResult.h"
 #include "public/web/WebViewClient.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "v8/include/v8.h"
 #include "web/WebViewImpl.h"
 
 using blink::URLTestHelpers::ToKURL;
 using blink::testing::RunPendingTasks;
-using testing::ElementsAre;
-using testing::Mock;
-using testing::_;
+using ::testing::ElementsAre;
+using ::testing::Mock;
+using ::testing::_;
 
 namespace blink {
 
 #if defined(THREAD_SANITIZER)
 #define DISABLE_ON_TSAN(test_name) DISABLED_##test_name
 #else
 #define DISABLE_ON_TSAN(test_name) test_name
 #endif  // defined(THREAD_SANITIZER)
 
 ::std::ostream& operator<<(::std::ostream& os, const WebFloatSize& size) {
@@ skipping 11880 matching lines @@
   tester.ExpectBucketCount(histogramName, kSPANavTypeOtherFragmentNavigation,
                            1);
   // kSameDocumentNavigationHistoryApi and kFrameLoadTypeBackForward is an
   // illegal combination, which has been caught by DCHECK in
   // UpdateForSameDocumentNavigation().
 
   tester.ExpectTotalCount(histogramName, 3);
 }
 
 }  // namespace blink