content: Pass IOSurface references using Mach IPC.

content/child/child_thread_impl.cc

Index: content/child/child_thread_impl.cc
diff --git a/content/child/child_thread_impl.cc b/content/child/child_thread_impl.cc
index cc13a5bf0a566b683a331b7e35d361f45cf18fe7..0dd92fe6474b6f3cf698c4dfb87fa694cbe859c7 100644
--- a/content/child/child_thread_impl.cc
+++ b/content/child/child_thread_impl.cc
@@ -63,6 +63,10 @@
 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
 #endif
 
+#if defined(OS_MACOSX) && !defined(OS_IOS)
+#include "content/child/child_io_surface_manager_mac.h"
+#endif
+
 using tracked_objects::ThreadData;
 
 namespace content {
@@ -570,6 +574,10 @@ bool ChildThreadImpl::OnMessageReceived(const IPC::Message& msg) {
 #if defined(USE_TCMALLOC)
     IPC_MESSAGE_HANDLER(ChildProcessMsg_GetTcmallocStats, OnGetTcmallocStats)
 #endif
+#if defined(OS_MACOSX) && !defined(OS_IOS)
+    IPC_MESSAGE_HANDLER(ChildProcessMsg_SetIOSurfaceManagerMailbox,
+                        OnSetIOSurfaceManagerMailbox)
+#endif
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
@@ -626,6 +634,13 @@ void ChildThreadImpl::OnGetTcmallocStats() {
 }
 #endif
 
+#if defined(OS_MACOSX) && !defined(OS_IOS)
+void ChildThreadImpl::OnSetIOSurfaceManagerMailbox(
+    const gpu::Mailbox& mailbox) {
+  ChildIOSurfaceManager::GetInstance()->set_mailbox(mailbox);
+}
+#endif
+
 ChildThreadImpl* ChildThreadImpl::current() {
   return g_lazy_tls.Pointer()->Get();
 }