Update V8 to r7427: Fix missing include in global-handles.h

Partial cherry-pick of
http://code.google.com/p/v8/source/detail?r=7579

We can't cherry-pick the entire change because it touches code we
don't yet have.

Change-Id: Ia606ab7049ffa66da61d965c6fa23a9b42a22fca
diff --git a/src/global-handles.h b/src/global-handles.h
index a6afb2d..b77fcb7 100644
--- a/src/global-handles.h
+++ b/src/global-handles.h
@@ -30,6 +30,8 @@
 
 #include "list-inl.h"
 
+#include "../include/v8-profiler.h"
+
 namespace v8 {
 namespace internal {