Replace IOSurfaceManager by directly passing IOSurface Mach ports over Chrome IPC.

content/browser/gpu/gpu_process_host.h

Index: content/browser/gpu/gpu_process_host.h
diff --git a/content/browser/gpu/gpu_process_host.h b/content/browser/gpu/gpu_process_host.h
index 74d99279f8e7bb96b4293e9f8a03f0d690f41939..60001e63b970d257333b8bada0a74aed68e4eb7a 100644
--- a/content/browser/gpu/gpu_process_host.h
+++ b/content/browser/gpu/gpu_process_host.h
@@ -34,10 +34,6 @@
 #include "ui/gfx/native_widget_types.h"
 #include "url/gurl.h"
 
-#if defined(OS_MACOSX) && !defined(OS_IOS)
-#include "content/common/mac/io_surface_manager_token.h"
-#endif
-
 struct GPUCreateCommandBufferConfig;
 
 namespace IPC {
@@ -295,12 +291,6 @@ class GpuProcessHost : public BrowserChildProcessHostDelegate,
 
   std::string shader_prefix_key_;
 
-#if defined(OS_MACOSX) && !defined(OS_IOS)
-  // Unique unguessable token that the GPU process is using to register
-  // IOSurfaces.
-  IOSurfaceManagerToken io_surface_manager_token_;
-#endif
-
   // Browser-side Mojo endpoint which sets up a Mojo channel with the child
   // process and contains the browser's ServiceRegistry.
   scoped_ptr<MojoApplicationHost> mojo_application_host_;