Use reference instead of pointer for media stream device request

chrome/browser/ui/media_stream_infobar_delegate.cc

Index: chrome/browser/ui/media_stream_infobar_delegate.cc
===================================================================
--- chrome/browser/ui/media_stream_infobar_delegate.cc	(revision 146197)
+++ chrome/browser/ui/media_stream_infobar_delegate.cc	(working copy)
@@ -37,12 +37,11 @@
     const content::MediaStreamRequest* request,
     const content::MediaResponseCallback& callback)
     : InfoBarDelegate(tab_helper),
-      request_(request),
+      request_(*request),
       callback_(callback) {
-  DCHECK(request_);
-  has_audio_ = request_->devices.count(
+  has_audio_ = request_.devices.count(
       content::MEDIA_STREAM_DEVICE_TYPE_AUDIO_CAPTURE) != 0;
-  has_video_ = request_->devices.count(
+  has_video_ = request_.devices.count(
       content::MEDIA_STREAM_DEVICE_TYPE_VIDEO_CAPTURE) != 0;
 }
 
@@ -54,8 +53,8 @@
   if (!has_audio_)
     return content::MediaStreamDevices();
   content::MediaStreamDeviceMap::const_iterator it =
-      request_->devices.find(content::MEDIA_STREAM_DEVICE_TYPE_AUDIO_CAPTURE);
-  DCHECK(it != request_->devices.end());
+      request_.devices.find(content::MEDIA_STREAM_DEVICE_TYPE_AUDIO_CAPTURE);
+  DCHECK(it != request_.devices.end());
   return it->second;
 }
 
@@ -64,13 +63,13 @@
   if (!has_video_)
     return content::MediaStreamDevices();
   content::MediaStreamDeviceMap::const_iterator it =
-      request_->devices.find(content::MEDIA_STREAM_DEVICE_TYPE_VIDEO_CAPTURE);
-  DCHECK(it != request_->devices.end());
+      request_.devices.find(content::MEDIA_STREAM_DEVICE_TYPE_VIDEO_CAPTURE);
+  DCHECK(it != request_.devices.end());
   return it->second;
 }
 
 const GURL& MediaStreamInfoBarDelegate::GetSecurityOrigin() const {
-  return request_->security_origin;
+  return request_.security_origin;
 }
 
 void MediaStreamInfoBarDelegate::Accept(const std::string& audio_id,
@@ -99,8 +98,8 @@
     content::MediaStreamDevices* devices) {
   DCHECK(devices);
   content::MediaStreamDeviceMap::const_iterator device_it =
-      request_->devices.find(type);
-  if (device_it != request_->devices.end()) {
+      request_.devices.find(type);
+  if (device_it != request_.devices.end()) {
     content::MediaStreamDevices::const_iterator it = std::find_if(
         device_it->second.begin(), device_it->second.end(), DeviceIdEquals(id));
     if (it != device_it->second.end())