content: Pass IOSurface references using Mach IPC.

content/browser/gpu/gpu_process_host.cc

Index: content/browser/gpu/gpu_process_host.cc
diff --git a/content/browser/gpu/gpu_process_host.cc b/content/browser/gpu/gpu_process_host.cc
index 2384a1b2cc24d135c3b99ef1ef0db40824a0a5fc..bebdaf3dc5ed5b2881f232e99d413cee7cbc17b7 100644
--- a/content/browser/gpu/gpu_process_host.cc
+++ b/content/browser/gpu/gpu_process_host.cc
@@ -60,6 +60,11 @@
 #include "ui/gfx/x/x11_switches.h"
 #endif
 
+#if defined(OS_MACOSX) && !defined(OS_IOS)
+#include "content/browser/browser_io_surface_manager_mac.h"
+#include "content/common/child_process_messages.h"
+#endif
+
 namespace content {
 
 bool GpuProcessHost::gpu_enabled_ = true;
@@ -589,6 +594,11 @@ bool GpuProcessHost::OnMessageReceived(const IPC::Message& message) {
 void GpuProcessHost::OnChannelConnected(int32 peer_pid) {
   TRACE_EVENT0("gpu", "GpuProcessHost::OnChannelConnected");
 
+#if defined(OS_MACOSX) && !defined(OS_IOS)
+  Send(new ChildProcessMsg_SetIOSurfaceManagerMailbox(
+      BrowserIOSurfaceManager::GetInstance()->GetGpuProcessMailbox()));
+#endif
+
   while (!queued_messages_.empty()) {
     Send(queued_messages_.front());
     queued_messages_.pop();