[turbofan] Some javascript operators are globally shared singletons.

src/compiler/ast-graph-builder.h

Index: src/compiler/ast-graph-builder.h
diff --git a/src/compiler/ast-graph-builder.h b/src/compiler/ast-graph-builder.h
index 6a7e3db90e09c2871c245825411598ac4169a9b4..1037556639493fb95fa3a3e98fbfafa919141e84 100644
--- a/src/compiler/ast-graph-builder.h
+++ b/src/compiler/ast-graph-builder.h
@@ -129,8 +129,8 @@ class AstGraphBuilder : public StructuredGraphBuilder, public AstVisitor {
   SetOncePointer<Node> function_closure_;
   SetOncePointer<Node> function_context_;
 
-  CompilationInfo* info() { return info_; }
-  StrictMode strict_mode() { return info()->strict_mode(); }
+  CompilationInfo* info() const { return info_; }
+  inline StrictMode strict_mode() const;
   JSGraph* jsgraph() { return jsgraph_; }
   JSOperatorBuilder* javascript() { return jsgraph_->javascript(); }
   ZoneList<Handle<Object> >* globals() { return &globals_; }