Remove implicit conversions from scoped_refptr to T* in content/

content/browser/device_monitor_mac.mm

Index: content/browser/device_monitor_mac.mm
diff --git a/content/browser/device_monitor_mac.mm b/content/browser/device_monitor_mac.mm
index 2110eb1e8614ffabf90d2bf556b93aa0585130c4..57a556b81d259e4525391233ea105ee8fa83f705 100644
--- a/content/browser/device_monitor_mac.mm
+++ b/content/browser/device_monitor_mac.mm
@@ -297,7 +297,9 @@ void SuspendObserverDelegate::StartObserver(
   // Enumerate the devices in Device thread and post the observers start to be
   // done on UI thread. The devices array is retained in |device_thread| and
   // released in DoStartObserver().
-  base::PostTaskAndReplyWithResult(device_thread, FROM_HERE,
+  base::PostTaskAndReplyWithResult(
+      device_thread.get(),
+      FROM_HERE,
       base::BindBlock(^{ return [[AVCaptureDeviceGlue devices] retain]; }),
       base::Bind(&SuspendObserverDelegate::DoStartObserver, this));
 }
@@ -308,7 +310,9 @@ void SuspendObserverDelegate::OnDeviceChanged(
   // Enumerate the devices in Device thread and post the consolidation of the
   // new devices and the old ones to be done on UI thread. The devices array
   // is retained in |device_thread| and released in DoOnDeviceChanged().
-  PostTaskAndReplyWithResult(device_thread, FROM_HERE,
+  PostTaskAndReplyWithResult(
+      device_thread.get(),
+      FROM_HERE,
       base::BindBlock(^{ return [[AVCaptureDeviceGlue devices] retain]; }),
       base::Bind(&SuspendObserverDelegate::DoOnDeviceChanged, this));
 }