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

third_party/WebKit/Source/core/events/TouchEventTest.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 "core/events/TouchEvent.h"
 
 #include "core/frame/FrameConsole.h"
 #include "core/frame/UseCounter.h"
 #include "core/loader/EmptyClients.h"
 #include "core/testing/DummyPageHolder.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
-using testing::ElementsAre;
+using ::testing::ElementsAre;
 
 namespace blink {
 
 class ConsoleCapturingChromeClient : public EmptyChromeClient {
  public:
   ConsoleCapturingChromeClient() : EmptyChromeClient() {}
 
   // ChromeClient methods:
   void AddMessageToConsole(LocalFrame*,
                            MessageSource message_source,
@@ skipping 10 matching lines @@
   const std::vector<String>& Messages() { return messages_; }
   const std::vector<MessageSource>& MessageSources() {
     return message_sources_;
   }
 
  private:
   std::vector<String> messages_;
   std::vector<MessageSource> message_sources_;
 };
 
-class TouchEventTest : public testing::Test {
+class TouchEventTest : public ::testing::Test {
  public:
   TouchEventTest() {
     chrome_client_ = new ConsoleCapturingChromeClient();
     Page::PageClients clients;
     FillWithEmptyClients(clients);
     clients.chrome_client = chrome_client_.Get();
     page_holder_ = DummyPageHolder::Create(IntSize(800, 600), &clients);
   }
 
   const std::vector<String>& Messages() { return chrome_client_->Messages(); }
@@ skipping 70 matching lines @@
   EXPECT_THAT(Messages(), ElementsAre());
   event->preventDefault();
   EXPECT_THAT(
       Messages(),
       ElementsAre("Unable to preventDefault inside passive event listener due "
                   "to target being treated as passive. See "
                   "https://www.chromestatus.com/features/5093566007214080"));
   EXPECT_THAT(MessageSources(), ElementsAre(kInterventionMessageSource));
 }
 
-class TouchEventTestNoFrame : public testing::Test {};
+class TouchEventTestNoFrame : public ::testing::Test {};
 
 TEST_F(TouchEventTestNoFrame, PreventDefaultDoesntRequireFrame) {
   TouchEvent::Create()->preventDefault();
 }
 
 }  // namespace blink