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

content/common/child_process_messages.h

Index: content/common/child_process_messages.h
diff --git a/content/common/child_process_messages.h b/content/common/child_process_messages.h
index bbca77c304845a9c0d9ed84df15e04ddda3eca4e..fd1060f6c3c8488e9f6e51cde27b94ae144e3a0d 100644
--- a/content/common/child_process_messages.h
+++ b/content/common/child_process_messages.h
@@ -20,10 +20,6 @@
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/ipc/gfx_param_traits.h"
 
-#if defined(OS_MACOSX)
-#include "content/common/mac/io_surface_manager_token.h"
-#endif
-
 IPC_ENUM_TRAITS_MAX_VALUE(tracked_objects::ThreadData::Status,
                           tracked_objects::ThreadData::STATUS_LAST)
 
@@ -74,6 +70,8 @@ IPC_STRUCT_TRAITS_BEGIN(gfx::GpuMemoryBufferHandle)
   IPC_STRUCT_TRAITS_MEMBER(stride)
 #if defined(USE_OZONE)
   IPC_STRUCT_TRAITS_MEMBER(native_pixmap_handle)
+#elif defined(OS_MACOSX)
+  IPC_STRUCT_TRAITS_MEMBER(mach_port)
 #endif
 IPC_STRUCT_TRAITS_END()
 
@@ -121,13 +119,6 @@ IPC_MESSAGE_CONTROL1(ChildProcessMsg_GetChildHistogramData,
 IPC_MESSAGE_CONTROL1(ChildProcessMsg_SetProcessBackgrounded,
                      bool /* background */)
 
-#if defined(OS_MACOSX)
-// Sent to child processes to tell them what token to use when registering
-// and/or acquiring IOSurfaces.
-IPC_MESSAGE_CONTROL1(ChildProcessMsg_SetIOSurfaceManagerToken,
-                     content::IOSurfaceManagerToken /* token */)
-#endif
-
 // Sends a pipe used by the child process to broker passing of Mojo handles.
 IPC_MESSAGE_CONTROL1(ChildProcessMsg_SetMojoParentPipeHandle,
                      IPC::PlatformFileForTransit /* handle */)