WeakPtr destruction order cleanup: media edition.

media/video/capture/mac/video_capture_device_mac.mm

 // Copyright (c) 2012 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/capture/mac/video_capture_device_mac.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 107 matching lines @@
     capture_device = NULL;
   }
   return capture_device;
 }
 
 VideoCaptureDeviceMac::VideoCaptureDeviceMac(const Name& device_name)
     : device_name_(device_name),
       tried_to_square_pixels_(false),
       task_runner_(base::MessageLoopProxy::current()),
       state_(kNotInitialized),
-      weak_factory_(this),
-      weak_this_(weak_factory_.GetWeakPtr()),
-      capture_device_(nil) {
+      capture_device_(nil),
+      weak_factory_(this) {
   final_resolution_selected_ = AVFoundationGlue::IsAVFoundationSupported();
 }
 
 VideoCaptureDeviceMac::~VideoCaptureDeviceMac() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   [capture_device_ release];
 }
 
 void VideoCaptureDeviceMac::AllocateAndStart(
     const VideoCaptureParams& params,
@@ skipping 165 matching lines @@
 
   client_->OnIncomingCapturedData(video_frame,
                                   video_frame_length,
                                   capture_format_,
                                   0,
                                   base::TimeTicks::Now());
 }
 
 void VideoCaptureDeviceMac::ReceiveError(const std::string& reason) {
   task_runner_->PostTask(FROM_HERE,
-      base::Bind(&VideoCaptureDeviceMac::SetErrorState, weak_this_,
-          reason));
+                         base::Bind(&VideoCaptureDeviceMac::SetErrorState,
+                                    weak_factory_.GetWeakPtr(),
+                                    reason));
 }
 
 void VideoCaptureDeviceMac::SetErrorState(const std::string& reason) {
   DCHECK(task_runner_->BelongsToCurrentThread());
   DLOG(ERROR) << reason;
   state_ = kError;
   client_->OnError(reason);
 }
 
 bool VideoCaptureDeviceMac::UpdateCaptureResolution() {
  if (![capture_device_ setCaptureHeight:capture_format_.frame_size.height()
                                   width:capture_format_.frame_size.width()
                               frameRate:capture_format_.frame_rate]) {
    ReceiveError("Could not configure capture device.");
    return false;
  }
  return true;
 }
 
 } // namespace media