Replace Handle<> with Local in remaining gin/*

gin/arguments.cc

Index: gin/arguments.cc
diff --git a/gin/arguments.cc b/gin/arguments.cc
index 30ff7849a2c9c5bbd0b2b5fd7d661f7b25f80810..8bd9930e4b68ad9513c94d4e75f6ee056a09c516 100644
--- a/gin/arguments.cc
+++ b/gin/arguments.cc
@@ -26,13 +26,13 @@ Arguments::Arguments(const v8::FunctionCallbackInfo<v8::Value>& info)
 Arguments::~Arguments() {
 }
 
-v8::Handle<v8::Value> Arguments::PeekNext() const {
+v8::Local<v8::Value> Arguments::PeekNext() const {
   if (next_ >= info_->Length())
-    return v8::Handle<v8::Value>();
+    return v8::Local<v8::Value>();
   return (*info_)[next_];
 }
 
-std::string V8TypeAsString(v8::Handle<v8::Value> value) {
+std::string V8TypeAsString(v8::Local<v8::Value> value) {
   if (value.IsEmpty())
     return "<empty handle>";
   if (value->IsUndefined())