Add script streaming API

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index c975471eccf8ef67bb5d835860336e3bdd53b8cb..ff9d7db5adde4590cdd04aaaedcdea95b25a3821 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -627,9 +627,11 @@ class Parser : public ParserBase<ParserTraits> {
     return parser.Parse();
   }
   bool Parse();
+  void ParseOnBackground();
 
  private:
   friend class ParserTraits;
+  friend class v8::ScriptCompiler;
 
   // Limit the allowed number of local variables in a function. The hard limit
   // is that offsets computed by FullCodeGenerator::StackOperand and similar
@@ -663,8 +665,8 @@ class Parser : public ParserBase<ParserTraits> {
   CompilationInfo* info() const { return info_; }
 
   // Called by ParseProgram after setting up the scanner.
-  FunctionLiteral* DoParseProgram(CompilationInfo* info,
-                                  Handle<String> source);
+  FunctionLiteral* DoParseProgram(CompilationInfo* info, Scope** scope,
+                                  Scope** ad_hoc_eval_scope);
 
   void SetCachedData();
 
@@ -682,7 +684,8 @@ class Parser : public ParserBase<ParserTraits> {
   // By making the 'exception handling' explicit, we are forced to check
   // for failure at the call sites.
   void* ParseSourceElements(ZoneList<Statement*>* processor, int end_token,
-                            bool is_eval, bool is_global, bool* ok);
+                            bool is_eval, bool is_global,
+                            Scope** ad_hoc_eval_scope, bool* ok);
   Statement* ParseModuleElement(ZoneList<const AstRawString*>* labels,
                                 bool* ok);
   Statement* ParseModuleDeclaration(ZoneList<const AstRawString*>* names,