Eliminate use of CompilationInfo in several AstVisitor descendants.

src/typing.h

Index: src/typing.h
diff --git a/src/typing.h b/src/typing.h
index ccfb973437faa6f672ac1f1f0ffb29f895aa7516..8b3e97b67ca67141ab9283c580fd2982c6a973e8 100644
--- a/src/typing.h
+++ b/src/typing.h
@@ -19,7 +19,8 @@ namespace internal {
 
 class AstTyper: public AstVisitor {
  public:
-  explicit AstTyper(CompilationInfo* info);
+  AstTyper(Isolate* isolate, Zone* zone, Handle<JSFunction> closure,
+           Scope* scope, BailoutId osr_ast_id, FunctionLiteral* root);
   void Run();
 
   DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
@@ -32,7 +33,10 @@ class AstTyper: public AstVisitor {
   typedef v8::internal::Effects<int, kNoVar> Effects;
   typedef v8::internal::NestedEffects<int, kNoVar> Store;
 
-  CompilationInfo* info_;
+  Handle<JSFunction> closure_;
+  Scope* scope_;
+  BailoutId osr_ast_id_;
+  FunctionLiteral* root_;
   TypeFeedbackOracle oracle_;
   Store store_;