Fix typo'd usage of OS_MAC vs OS_MACOSX!

content/browser/renderer_host/render_process_host_impl.cc

 // 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 752 matching lines @@
     switches::kEnableEncryptedMedia,
     switches::kEnableExperimentalWebKitFeatures,
     switches::kEnableFixedLayout,
     switches::kEnableDeferredImageDecoding,
     switches::kEnableGPUServiceLogging,
     switches::kEnableGPUClientLogging,
     switches::kEnableGpuBenchmarking,
     switches::kEnableLogging,
     switches::kDisableMediaSource,
     switches::kDisableWebMediaPlayerMS,
-#if defined(OS_WIN) || defined(OS_MAC)
+#if defined(OS_WIN) || defined(OS_MACOSX)
     switches::kDisableRendererSideMixing,
 #else
     switches::kEnableRendererSideMixing,
 #endif
     switches::kEnableStrictSiteIsolation,
     switches::kDisableFullScreen,
     switches::kEnablePepperTesting,
     switches::kEnablePreparsedJsCaching,
     switches::kEnablePruneGpuCommandBuffers,
     switches::kEnablePinch,
@@ skipping 805 matching lines @@
       int32 gpu_process_host_id) {
   TRACE_EVENT0("renderer_host",
                "RenderWidgetHostImpl::OnCompositorSurfaceBuffersSwappedNoHost");
   RenderWidgetHostImpl::AcknowledgeBufferPresent(route_id,
                                                  gpu_process_host_id,
                                                  surface_handle,
                                                  0);
 }
 
 }  // namespace content