Extract minimal RenderViewHost interface for embedders, leaving

content/browser/renderer_host/backing_store_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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "content/browser/renderer_host/backing_store_mac.h"
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
@@ skipping 177 matching lines @@
                          bitmap_image);
       CGContextRestoreGState(cg_bitmap_);
     }
   }
 }
 
 CGLayerRef BackingStoreMac::CreateCGLayer() {
   // The CGLayer should be optimized for drawing into the containing window,
   // so extract a CGContext corresponding to the window to be passed to
   // CGLayerCreateWithContext.
-  NSWindow* window = [render_widget_host()->view()->GetNativeView() window];
+  NSWindow* window = [render_widget_host()->GetView()->GetNativeView() window];
   if ([window windowNumber] <= 0) {
     // This catches a nil |window|, as well as windows that exist but that
     // aren't yet connected to WindowServer.
     return NULL;
   }
 
   NSGraphicsContext* ns_context = [window graphicsContext];
   DCHECK(ns_context);
 
   CGContextRef cg_context = static_cast<CGContextRef>(
@@ skipping 14 matching lines @@
   CGContextRef context = CGBitmapContextCreate(NULL,
                                                size().width(), size().height(),
                                                8, size().width() * 4,
                                                base::mac::GetSystemColorSpace(),
                                                kCGImageAlphaPremultipliedFirst |
                                                    kCGBitmapByteOrder32Host);
   DCHECK(context);
 
   return context;
 }