Remove unused linked_ptr inclusion

media/video/gpu_memory_buffer_video_frame_pool.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 "media/video/gpu_memory_buffer_video_frame_pool.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
 #include <list>
 #include <memory>
 #include <utility>
 
 #include "base/barrier_closure.h"
 #include "base/bind.h"
 #include "base/containers/stack_container.h"
 #include "base/location.h"
 #include "base/macros.h"
-#include "base/memory/linked_ptr.h"
 #include "base/strings/stringprintf.h"
 #include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/memory_dump_provider.h"
 #include "base/trace_event/trace_event.h"
 #include "gpu/GLES2/gl2extchromium.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "media/base/bind_to_current_loop.h"
 #include "media/renderers/gpu_video_accelerator_factories.h"
 #include "third_party/libyuv/include/libyuv.h"
 #include "ui/gfx/buffer_format_util.h"
@@ skipping 793 matching lines @@
 }
 
 void GpuMemoryBufferVideoFramePool::MaybeCreateHardwareFrame(
     const scoped_refptr<VideoFrame>& video_frame,
     const FrameReadyCB& frame_ready_cb) {
   DCHECK(video_frame);
   pool_impl_->CreateHardwareFrame(video_frame, frame_ready_cb);
 }
 
 }  // namespace media