Merge pull request #1123 from Microsoft/allowIn

Keep track of 'disallowIn' as an ambient parser flag instead of having to pass it along everywhere.

Author: CyrusNajmabadi

src/services/syntax/constants.ts

@@ -15,12 +15,13 @@ module TypeScript {
         // only be used by the incremental parser if it is parsed in the same strict context as before.
         // last masks off the part of the int
         //
-        // The width of the node is stored in the remainder of the int.  This allows us up to 512MB
-        // for a node by using all 29 bits.  However, in the common case, we'll use less than 29 bits
+        // The width of the node is stored in the remainder of the int.  This allows us up to 256MB
+        // for a node by using all 28 bits.  However, in the common case, we'll use less than 28 bits
         // for the width.  Thus, the info will be stored in a single int in chakra.
         NodeDataComputed              = 0x00000001, // 0000 0000 0000 0000 0000 0000 0000 0001
         NodeIncrementallyUnusableMask = 0x00000002, // 0000 0000 0000 0000 0000 0000 0000 0010
         NodeParsedInStrictModeMask    = 0x00000004, // 0000 0000 0000 0000 0000 0000 0000 0100
-        NodeFullWidthShift            = 3,          // 1111 1111 1111 1111 1111 1111 1111 1000
+        NodeParsedInDisallowInMask    = 0x00000008, // 0000 0000 0000 0000 0000 0000 0000 1000
+        NodeFullWidthShift            = 4,          // 1111 1111 1111 1111 1111 1111 1111 0000
     }
 }