Deleted code associated with --enable-gpu-rendering and...

chrome/browser/renderer_host/backing_store_mac.mm

 // Copyright (c) 2010 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 "chrome/browser/renderer_host/backing_store_mac.h"
 
 #include "app/surface/transport_dib.h"
 #include "base/logging.h"
@@ skipping 38 matching lines @@
   }
 }
 
 BackingStoreMac::~BackingStoreMac() {
 }
 
 void BackingStoreMac::PaintToBackingStore(
     RenderProcessHost* process,
     TransportDIB::Id bitmap,
     const gfx::Rect& bitmap_rect,
-    const std::vector<gfx::Rect>& copy_rects,
-    bool* painted_synchronously) {
-  // Our paints are always synchronous and the caller can free the TransportDIB,
-  // even on failure.
-  *painted_synchronously = true;
-
+    const std::vector<gfx::Rect>& copy_rects) {
   DCHECK_NE(static_cast<bool>(cg_layer()), static_cast<bool>(cg_bitmap()));
 
   TransportDIB* dib = process->GetTransportDIB(bitmap);
   if (!dib)
     return;
 
   base::mac::ScopedCFTypeRef<CGDataProviderRef> data_provider(
       CGDataProviderCreateWithData(NULL, dib->memory(),
       bitmap_rect.width() * bitmap_rect.height() * 4, NULL));
 
@@ skipping 163 matching lines @@
   CGContextRef context = CGBitmapContextCreate(NULL,
                                                size().width(), size().height(),
                                                8, size().width() * 4,
                                                mac_util::GetSystemColorSpace(),
                                                kCGImageAlphaPremultipliedFirst |
                                                    kCGBitmapByteOrder32Host);
   DCHECK(context);
 
   return context;
 }