Parser cleanup: less member variables.

Parser had unnecessary member pointers to stuff stored in the
CompilationInfo (which Parser also points to).

As we add more parsing code paths (in particular, script streaming), this gets
confusing and Parser and CompilationInfo can get out of sync.

BUG=
R=jochen@chromium.org, rossberg@chromium.org

Review URL: https://codereview.chromium.org/527233003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23861 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/parser.h

@@ -655,8 +655,12 @@ class Parser : public ParserBase<ParserTraits> {
   FunctionLiteral* ParseLazy();
   FunctionLiteral* ParseLazy(Utf16CharacterStream* source);
 
-  Isolate* isolate() { return isolate_; }
+  Isolate* isolate() { return info_->isolate(); }
   CompilationInfo* info() const { return info_; }
+  Handle<Script> script() const { return info_->script(); }
+  AstValueFactory* ast_value_factory() const {
+    return info_->ast_value_factory();
+  }
 
   // Called by ParseProgram after setting up the scanner.
   FunctionLiteral* DoParseProgram(CompilationInfo* info,
@@ -805,15 +809,11 @@ class Parser : public ParserBase<ParserTraits> {
   // internalize strings (move them to the heap).
   void Internalize();
 
-  Isolate* isolate_;
-
-  Handle<Script> script_;
   Scanner scanner_;
   PreParser* reusable_preparser_;
   Scope* original_scope_;  // for ES5 function declarations in sloppy eval
   Target* target_stack_;  // for break, continue statements
   ParseData* cached_parse_data_;
-  AstValueFactory* ast_value_factory_;
 
   CompilationInfo* info_;
 
@@ -846,7 +846,7 @@ Scope* ParserTraits::NewScope(Scope* parent_scope, ScopeType scope_type) {
 
 
 const AstRawString* ParserTraits::EmptyIdentifierString() {
-  return parser_->ast_value_factory_->empty_string();
+  return parser_->ast_value_factory()->empty_string();
 }
 
 
@@ -873,7 +873,7 @@ void ParserTraits::CheckConflictingVarDeclarations(v8::internal::Scope* scope,
 
 
 AstValueFactory* ParserTraits::ast_value_factory() {
-  return parser_->ast_value_factory_;
+  return parser_->ast_value_factory();
 }