Update OS X to use scoped_refptr<T>::get() rather than implicit "operator T*"

content/browser/renderer_host/render_widget_host_view_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 "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #include <QuartzCore/QuartzCore.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 474 matching lines @@
 
   if (compositing_iosurface_) {
     if (!CreateCompositedIOSurfaceAndLayer()) {
       LOG(ERROR) << "Failed to create CALayer for existing IOSurface";
     }
   }
 }
 
 bool RenderWidgetHostViewMac::CreateCompositedIOSurfaceAndLayer() {
   if (compositing_iosurface_layer_ &&
-      [compositing_iosurface_layer_ context] &&
+      [compositing_iosurface_layer_ context].get() &&
       compositing_iosurface_) {
     return true;
   }
 
   ScopedCAActionDisabler disabler;
   if (!compositing_iosurface_layer_) {
     compositing_iosurface_layer_.reset([[CompositingIOSurfaceLayer alloc]
         initWithRenderWidgetHostViewMac:this]);
     if (!compositing_iosurface_layer_) {
       LOG(ERROR) << "Failed to create CALayer for IOSurface";
@@ skipping 590 matching lines @@
 void RenderWidgetHostViewMac::CopyFromCompositingSurfaceToVideoFrame(
       const gfx::Rect& src_subrect,
       const scoped_refptr<media::VideoFrame>& target,
       const base::Callback<void(bool)>& callback) {
   base::ScopedClosureRunner scoped_callback_runner(base::Bind(callback, false));
   if (!render_widget_host_->is_accelerated_compositing_active() ||
       !compositing_iosurface_ ||
       !compositing_iosurface_->HasIOSurface())
     return;
 
-  if (!target) {
+  if (!target.get()) {
     NOTREACHED();
     return;
   }
 
   if (target->format() != media::VideoFrame::YV12 &&
       target->format() != media::VideoFrame::I420) {
     NOTREACHED();
     return;
   }
 
@@ skipping 2596 matching lines @@
   return YES;
 }
 
 - (BOOL)isOpaque {
   if (renderWidgetHostView_->use_core_animation_)
     return YES;
   return [super isOpaque];
 }
 
 @end