Array constructor can be simplified by loading context from JSFunction.

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 1756 matching lines @@
 
   void BuildCreateAllocationMemento(HValue* previous_object,
                                     HValue* previous_object_size,
                                     HValue* payload);
 
   HInstruction* BuildConstantMapCheck(Handle<JSObject> constant,
                                       CompilationInfo* info);
   HInstruction* BuildCheckPrototypeMaps(Handle<JSObject> prototype,
                                         Handle<JSObject> holder);
 
+  HInstruction* BuildGetNativeContext(HValue* closure);
   HInstruction* BuildGetNativeContext();
   HInstruction* BuildGetArrayFunction();
 
  protected:
   void SetSourcePosition(int position) {
     ASSERT(position != RelocInfo::kNoPosition);
     position_ = position;
   }
 
   template <typename ViewClass>
@@ skipping 902 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_