Internalize strings in-place

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 3ac47f8a89bca18e0a4c931c55cc351b208438c1..8ef718bd47e303860eb54511b6ee294c06a2bc32 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -2327,7 +2327,7 @@ class V8_EXPORT String : public Name {
   enum Encoding {
     UNKNOWN_ENCODING = 0x1,
     TWO_BYTE_ENCODING = 0x0,
-    ONE_BYTE_ENCODING = 0x4
+    ONE_BYTE_ENCODING = 0x8
   };
   /**
    * Returns the number of characters in this string.
@@ -8451,10 +8451,10 @@ class Internals {
   static const int kFixedArrayHeaderSize = 2 * kApiPointerSize;
   static const int kContextHeaderSize = 2 * kApiPointerSize;
   static const int kContextEmbedderDataIndex = 5;
-  static const int kFullStringRepresentationMask = 0x07;
-  static const int kStringEncodingMask = 0x4;
+  static const int kFullStringRepresentationMask = 0x0f;
+  static const int kStringEncodingMask = 0x8;
   static const int kExternalTwoByteRepresentationTag = 0x02;
-  static const int kExternalOneByteRepresentationTag = 0x06;
+  static const int kExternalOneByteRepresentationTag = 0x0a;
 
   static const int kIsolateEmbedderDataOffset = 0 * kApiPointerSize;
   static const int kExternalMemoryOffset = 4 * kApiPointerSize;