Revert svn r4269 and r4298.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 9197466e85e4564cfe29e38e814e4865e5c06a64..5a0db0177ba696db960552669c5845947c80234a 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -3667,13 +3667,6 @@ class JSRegExp: public JSObject {
       FixedArray::kHeaderSize + kIrregexpUC16CodeIndex * kPointerSize;
   static const int kIrregexpCaptureCountOffset =
       FixedArray::kHeaderSize + kIrregexpCaptureCountIndex * kPointerSize;
-
-  // In-object fields.
-  static const int kSourceFieldIndex = 0;
-  static const int kGlobalFieldIndex = 1;
-  static const int kIgnoreCaseFieldIndex = 2;
-  static const int kMultilineFieldIndex = 3;
-  static const int kLastIndexFieldIndex = 4;
 };