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

third_party/WebKit/Source/core/exported/WebElementTest.cpp

 // Copyright 2014 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 "public/web/WebElement.h"
 
 #include <memory>
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/ShadowRoot.h"
@@ skipping 42 matching lines @@
 static const char kBlockWithInlines[] =
     "<div id='testElement'>"
     "  <span>Hello</span> "
     "</div>";
 
 static const char kBlockWithEmptyInlines[] =
     "<div id='testElement'>"
     "  <span></span> "
     "</div>";
 
-class WebElementTest : public testing::Test {
+class WebElementTest : public ::testing::Test {
  protected:
   Document& GetDocument() { return page_holder_->GetDocument(); }
   void InsertHTML(String html);
   WebElement TestElement();
 
  private:
   void SetUp() override;
 
   std::unique_ptr<DummyPageHolder> page_holder_;
 };
@@ skipping 72 matching lines @@
   EXPECT_FALSE(TestElement().IsEditable());
 
   InsertHTML("<input id=testElement disabled>");
   EXPECT_FALSE(TestElement().IsEditable());
 
   InsertHTML("<fieldset disabled><div><input id=testElement></div></fieldset>");
   EXPECT_FALSE(TestElement().IsEditable());
 }
 
 }  // namespace blink