Use correct arguments adaptation environment when inlining function containing arguments.

src/hydrogen.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 382 matching lines @@
                Scope* scope,
                Handle<JSFunction> closure);
 
   HEnvironment* DiscardInlined(bool drop_extra) {
     HEnvironment* outer = outer_;
     while (outer->frame_type() != JS_FUNCTION) outer = outer->outer_;
     if (drop_extra) outer->Drop(1);
     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_; }
   const ZoneList<int>* assigned_variables() const {
     return &assigned_variables_;
   }
   FrameType frame_type() const { return frame_type_; }
   int parameter_count() const { return parameter_count_; }
   int specials_count() const { return specials_count_; }
   int local_count() const { return local_count_; }
@@ skipping 953 matching lines @@
   const char* filename_;
   HeapStringAllocator string_allocator_;
   StringStream trace_;
   int indent_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_