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

third_party/WebKit/Source/platform/scheduler/base/task_queue_manager_perftest.cc

 // 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/scheduler/base/task_queue_manager.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
@@ skipping 42 matching lines @@
   void CancelWakeUpAt(base::TimeTicks run_time) override {
     // We didn't post a delayed task in RequestWakeUpAt so there's no need to do
     // anything here.
   }
 
   const char* GetName() const override { return "PerfTestTimeDomain"; }
 
   DISALLOW_COPY_AND_ASSIGN(PerfTestTimeDomain);
 };
 
-class TaskQueueManagerPerfTest : public testing::Test {
+class TaskQueueManagerPerfTest : public ::testing::Test {
  public:
   TaskQueueManagerPerfTest()
       : num_queues_(0),
         max_tasks_in_flight_(0),
         num_tasks_in_flight_(0),
         num_tasks_to_post_(0),
         num_tasks_to_run_(0) {}
 
   void SetUp() override {
     if (base::ThreadTicks::IsSupported())
@@ skipping 142 matching lines @@
   Benchmark("run 10000 delayed tasks with eight queues",
             base::Bind(&TaskQueueManagerPerfTest::ResetAndCallTestDelayedTask,
                        base::Unretained(this), 10000));
 }
 
 // TODO(alexclarke): Add additional tests with different mixes of non-delayed vs
 // delayed tasks.
 
 }  // namespace scheduler
 }  // namespace blink