Merge V8 5.3.332.45.  DO NOT MERGE

Test: Manual

FPIIM-449

Change-Id: Id3254828b068abdea3cb10442e0172a8c9a98e03
(cherry picked from commit 13e2dadd00298019ed862f2b2fc5068bba730bcf)
diff --git a/src/compiler/js-inlining.h b/src/compiler/js-inlining.h
index d0ab7c0..88cbf89 100644
--- a/src/compiler/js-inlining.h
+++ b/src/compiler/js-inlining.h
@@ -36,9 +36,12 @@
   Reduction ReduceJSCall(Node* node, Handle<JSFunction> function);
 
  private:
-  Zone* local_zone_;
+  Graph* graph() const;
+  JSGraph* jsgraph() const { return jsgraph_; }
+
+  Zone* const local_zone_;
   CompilationInfo* info_;
-  JSGraph* jsgraph_;
+  JSGraph* const jsgraph_;
 
   Node* CreateArtificialFrameState(Node* node, Node* outer_frame_state,
                                    int parameter_count,