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

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

 /*
  * Copyright (C) 2012 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 62 matching lines @@
                       WebNavigationPolicy,
                       bool,
                       WebSandboxFlags) override {
     return web_view_helper_.InitializeWithOpener(opener);
   }
 
  private:
   FrameTestHelpers::WebViewHelper web_view_helper_;
 };
 
-class CreateWindowTest : public testing::Test {
+class CreateWindowTest : public ::testing::Test {
  protected:
   void SetUp() override {
     web_view_ = helper_.Initialize(nullptr, &web_view_client_);
     main_frame_ = helper_.LocalMainFrame();
     chrome_client_impl_ =
         ToChromeClientImpl(&web_view_->GetPage()->GetChromeClient());
   }
 
   ViewCreatingClient web_view_client_;
   FrameTestHelpers::WebViewHelper helper_;
@@ skipping 60 matching lines @@
   // DateTimeChooserClient
   Element& OwnerElement() const override { return *owner_element_; }
   void DidChooseValue(const String&) override {}
   void DidChooseValue(double) override {}
   void DidEndChooser() override {}
 
  private:
   Member<Element> owner_element_;
 };
 
-class PagePopupSuppressionTest : public testing::Test {
+class PagePopupSuppressionTest : public ::testing::Test {
  public:
   PagePopupSuppressionTest() {}
 
   bool CanOpenColorChooser() {
     LocalFrame* frame = main_frame_->GetFrame();
     Color color;
     return !!chrome_client_impl_->OpenColorChooser(frame, color_chooser_client_,
                                                    color);
   }
 
@@ skipping 71 matching lines @@
   Settings* settings = GetSettings();
   settings->SetPagePopupsSuppressed(true);
 
   EXPECT_FALSE(CanOpenPopupMenu());
 
   settings->SetPagePopupsSuppressed(false);
   EXPECT_TRUE(CanOpenPopupMenu());
 }
 
 }  // namespace blink