content: Pass IOSurface references using Mach IPC.

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index a7141e4fc77eff52db504473ea70d0c81cd4cf30..f74cabdb1413b795dc17f5f67742a5fce1eaeafb 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -183,6 +183,10 @@
 #include "ui/gfx/win/dpi.h"
 #endif
 
+#if defined(OS_MACOSX) && !defined(OS_IOS)
+#include "content/browser/browser_io_surface_manager_mac.h"
+#endif
+
 #if defined(ENABLE_BROWSER_CDMS)
 #include "content/browser/media/cdm/browser_cdm_manager.h"
 #endif
@@ -1550,6 +1554,14 @@ void RenderProcessHostImpl::OnChannelConnected(int32 peer_pid) {
   tracked_objects::ThreadData::Status status =
       tracked_objects::ThreadData::status();
   Send(new ChildProcessMsg_SetProfilerStatus(status));
+
+#if defined(OS_MACOSX) && !defined(OS_IOS)
+  io_surface_manager_mailbox_ =
+      BrowserIOSurfaceManager::GetInstance()->GenerateChildProcessMailbox(
+          GetID());
+  Send(new ChildProcessMsg_SetIOSurfaceManagerMailbox(
+      io_surface_manager_mailbox_));
+#endif
 }
 
 void RenderProcessHostImpl::OnChannelError() {
@@ -1667,6 +1679,13 @@ void RenderProcessHostImpl::Cleanup() {
     // reused in between now and when the Delete task runs.
     UnregisterHost(GetID());
   }
+
+#if defined(OS_MACOSX) && !defined(OS_IOS)
+  if (!io_surface_manager_mailbox_.IsZero()) {
+    BrowserIOSurfaceManager::GetInstance()->InvalidateChildProcessMailbox(
+        io_surface_manager_mailbox_);
+  }
+#endif
 }
 
 void RenderProcessHostImpl::AddPendingView() {