Introduce a new AccessorPair type for handling JavaScript accessors.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index 2d993bbc2b49ddae584b0d824123b33229ff2f9c..7c465a12fdaec37c63bc3a998f3d2142ba2b2c0e 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -615,6 +615,9 @@ class Heap {
   // Allocates an empty PolymorphicCodeCache.
   MUST_USE_RESULT MaybeObject* AllocatePolymorphicCodeCache();
 
+  // Allocates an empty AccessorPair.
+  MaybeObject* AllocateAccessorPair();

[Kevin Millikin (Chromium), 2012/01/10 08:57:30]

MUST_USE_RESULT to warn if a developer does not check for allocation failure.

[Sven Panne, 2012/01/10 09:45:03]

Done.

+
   // Clear the Instanceof cache (used when a prototype changes).
   inline void ClearInstanceofCache();