Fix a bunch of IWYU violators that don't include scoped_ptr.h

chrome/browser/task_management/sampling/task_group_sampler.h

 // 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.
 
 #ifndef CHROME_BROWSER_TASK_MANAGEMENT_SAMPLING_TASK_GROUP_SAMPLER_H_
 #define CHROME_BROWSER_TASK_MANAGEMENT_SAMPLING_TASK_GROUP_SAMPLER_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/process/process.h"
 #include "base/process/process_handle.h"
 #include "base/process/process_metrics.h"
 #include "base/sequence_checker.h"
 #include "base/sequenced_task_runner.h"
 #include "build/build_config.h"
 
 namespace task_management {
 
 // Wraps the memory usage stats values together so that it can be sent between
@@ skipping 77 matching lines @@
   // To assert we're running on the correct thread.
   base::SequenceChecker worker_pool_sequenced_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskGroupSampler);
 };
 
 }  // namespace task_management
 
 
 #endif  // CHROME_BROWSER_TASK_MANAGEMENT_SAMPLING_TASK_GROUP_SAMPLER_H_