Convert Pass()→std::move() for Mac build.

content/gpu/gpu_main.cc

Index: content/gpu/gpu_main.cc
diff --git a/content/gpu/gpu_main.cc b/content/gpu/gpu_main.cc
index 0686c57577471216ddc2be2a2f618aa9cabc272a..6ab395480e837422a914c36af8282d0ac3973660 100644
--- a/content/gpu/gpu_main.cc
+++ b/content/gpu/gpu_main.cc
@@ -5,6 +5,8 @@
 #include <stddef.h>
 #include <stdlib.h>
 
+#include <utility>
+
 #include "base/lazy_instance.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
@@ -197,7 +199,7 @@ int GpuMain(const MainFunctionParams& parameters) {
   // This is necessary for CoreAnimation layers hosted in the GPU process to be
   // drawn. See http://crbug.com/312462.
   scoped_ptr<base::MessagePump> pump(new base::MessagePumpCFRunLoop());
-  base::MessageLoop main_message_loop(pump.Pass());
+  base::MessageLoop main_message_loop(std::move(pump));
 #else
   base::MessageLoop main_message_loop(base::MessageLoop::TYPE_IO);
 #endif