replace to be deprecated v8::PersistentValueMap with v8::GlobalValueMap

gin/interceptor_unittest.cc

Index: gin/interceptor_unittest.cc
diff --git a/gin/interceptor_unittest.cc b/gin/interceptor_unittest.cc
index 4d2d7fb89df3efab032365d946017943dfb95aa9..af830d4d0314fa2b5d22d9f0558aa9fce995a6e8 100644
--- a/gin/interceptor_unittest.cc
+++ b/gin/interceptor_unittest.cc
@@ -118,7 +118,7 @@ class MyInterceptor : public Wrappable<MyInterceptor>,
 
   int value_;
 
-  v8::StdPersistentValueMap<std::string, v8::FunctionTemplate> template_cache_;
+  v8::StdGlobalValueMap<std::string, v8::FunctionTemplate> template_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(MyInterceptor);
 };