content: Pass IOSurface references using Mach IPC.

content/app/content_main_runner.cc

Index: content/app/content_main_runner.cc
diff --git a/content/app/content_main_runner.cc b/content/app/content_main_runner.cc
index 279536b09b983deec9ae5f22856e5c0bbb72f83a..ad1cb0d4eb5a034b987f9a29a5128eeef34234bb 100644
--- a/content/app/content_main_runner.cc
+++ b/content/app/content_main_runner.cc
@@ -87,6 +87,7 @@
 #include "base/power_monitor/power_monitor_device_source.h"
 #include "content/app/mac/mac_init.h"
 #include "content/browser/mach_broker_mac.h"
+#include "content/child/child_io_surface_manager_mac.h"
 #include "content/common/sandbox_init_mac.h"
 #endif  // !OS_IOS
 #endif  // OS_WIN
@@ -664,6 +665,11 @@ class ContentMainRunnerImpl : public ContentMainRunner {
         (!delegate_ || delegate_->ShouldSendMachPort(process_type))) {
       MachBroker::ChildSendTaskPortToParent();
     }
+
+    if (!process_type.empty() && (process_type == switches::kRendererProcess ||
+                                  process_type == switches::kGpuProcess)) {
+      IOSurfaceManager::SetInstance(ChildIOSurfaceManager::GetInstance());
+    }
 #elif defined(OS_WIN)
     SetupCRT(command_line);
 #endif