Rewrite scoped_ptr<T>(NULL) to use the default ctor in content/.

content/renderer/device_orientation_dispatcher.cc

 // 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 "content/renderer/device_orientation_dispatcher.h"
 
 #include "content/common/device_orientation_messages.h"
 #include "content/renderer/render_view_impl.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDeviceOrientation.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDeviceOrientationController.h"
 
 namespace content {
 
 DeviceOrientationDispatcher::DeviceOrientationDispatcher(
     RenderViewImpl* render_view)
-    : RenderViewObserver(render_view),
-      controller_(NULL),
-      started_(false) {
-}
+    : RenderViewObserver(render_view), started_(false) {}
 
 DeviceOrientationDispatcher::~DeviceOrientationDispatcher() {
   if (started_)
     stopUpdating();
 }
 
 bool DeviceOrientationDispatcher::OnMessageReceived(const IPC::Message& msg) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(DeviceOrientationDispatcher, msg)
     IPC_MESSAGE_HANDLER(DeviceOrientationMsg_Updated,
@@ skipping 58 matching lines @@
   if (p.can_provide_beta)
     last_orientation_.setBeta(p.beta);
   if (p.can_provide_gamma)
     last_orientation_.setGamma(p.gamma);
   if (p.can_provide_absolute)
     last_orientation_.setAbsolute(p.absolute);
   controller_->didChangeDeviceOrientation(last_orientation_);
 }
 
 }  // namespace content