Add kHeaderSize constant to SeqString.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 8f854b8060e86124d781b888344efdb79b4bc77e..8ffb96f45627804a88a53a342a3d90c458fb9b5d 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6127,6 +6127,10 @@ class SeqString: public String {
   // Casting.
   static inline SeqString* cast(Object* obj);
 
+  // Layout description.
+  static const int kHeaderSize = String::kSize;
+  static const int kAlignedSize = POINTER_SIZE_ALIGN(kHeaderSize);

[Lasse Reichstein, 2011/09/20 08:42:01]

Do we ever use kAlignedSize any more?
Since we made the string length a Smi, it's always the same as kHeaderSize (even
on x64, where previously it was kIntSize less), so we could remove it now.

[Michael Starzinger, 2011/09/20 16:07:39]

Done.

+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(SeqString);
 };
@@ -6160,10 +6164,6 @@ class SeqAsciiString: public SeqString {
     return OBJECT_POINTER_ALIGN(kHeaderSize + length * kCharSize);
   }
 
-  // Layout description.
-  static const int kHeaderSize = String::kSize;
-  static const int kAlignedSize = POINTER_SIZE_ALIGN(kHeaderSize);
-
   // Maximal memory usage for a single sequential ASCII string.
   static const int kMaxSize = 512 * MB - 1;
   // Maximal length of a single sequential ASCII string.
@@ -6214,10 +6214,6 @@ class SeqTwoByteString: public SeqString {
     return OBJECT_POINTER_ALIGN(kHeaderSize + length * kShortSize);
   }
 
-  // Layout description.
-  static const int kHeaderSize = String::kSize;
-  static const int kAlignedSize = POINTER_SIZE_ALIGN(kHeaderSize);
-
   // Maximal memory usage for a single sequential two-byte string.
   static const int kMaxSize = 512 * MB - 1;
   // Maximal length of a single sequential two-byte string.