Two-threaded parser

src/isolate.h

Index: src/isolate.h
diff --git a/src/isolate.h b/src/isolate.h
index afebdf1381aa378e35fceaf2b3821b5465787ad7..c6dceb538b3771a5ba42535e1f782c96f73b3e12 100644
--- a/src/isolate.h
+++ b/src/isolate.h
@@ -68,6 +68,7 @@ class EmptyStatement;
 class ExternalCallbackScope;
 class ExternalReferenceTable;
 class Factory;
+class FastParserThread;
 class FunctionInfoListener;
 class HandleScopeImplementer;
 class HeapProfiler;
@@ -1100,6 +1101,10 @@ class Isolate {
     return optimizing_compiler_thread_;
   }
 
+  FastParserThread* fast_parser_thread() {
+    return fast_parser_thread_;
+  }
+
   int num_sweeper_threads() const {
     return num_sweeper_threads_;
   }
@@ -1349,6 +1354,7 @@ class Isolate {
 
   DeferredHandles* deferred_handles_head_;
   OptimizingCompilerThread* optimizing_compiler_thread_;
+  FastParserThread* fast_parser_thread_;
   SweeperThread** sweeper_thread_;
   int num_sweeper_threads_;