Use correct arguments adaptation environment when inlining function containing arguments.

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index 7262299c9a335ddd6029bf3215877cc427f481b8..e2779bb2260d10cfed8b0a048dd641b685e4cba6 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -400,6 +400,10 @@ class HEnvironment: public ZoneObject {
     return outer;
   }
 
+  HEnvironment* arguments_environment() {
+    return outer()->frame_type() == ARGUMENTS_ADAPTOR ? outer() : this;
+  }
+
   // Simple accessors.
   Handle<JSFunction> closure() const { return closure_; }
   const ZoneList<HValue*>* values() const { return &values_; }