Addressed perf regression in Browsermark2.0 array blur test

src/ast.h

Index: src/ast.h
diff --git a/src/ast.h b/src/ast.h
index e3fc053d8e8bd54d6d42d187c2ab1d4f899fae59..4158907d993ecdb4a30c64bed47e40d41fdc5d0e 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -1604,6 +1604,12 @@ class ArrayLiteral V8_FINAL : public MaterializedLiteral {
   // Populate the constant elements fixed array.
   void BuildConstantElements(Isolate* isolate);
 
+  enum Flags {

[Michael Starzinger, 2013/11/20 21:26:19]

These flags are used for an interface between generated code and the runtime,
it's unrelated to the AST. Please move the flags somewhere more appropriate. I
would propose the runtime.h file. You could even use bit-fields to encode the
flags.

[mvstanton, 2013/11/22 14:42:00]

In that case I should probably move ObjectLiteral::Flags to runtime.h as well,
because I'm simply making the array literal infrastructure symmetrical with the
object literal infrastructure.

+    kNoFlags = 0,
+    kShallowElements = 1,
+    kDisableMementos = 1 << 1
+  };
+
  protected:
   ArrayLiteral(Isolate* isolate,
                ZoneList<Expression*>* values,