Implemented specialized stubs for API getters. This includes a number...

src/code-stubs.h

Index: src/code-stubs.h
===================================================================
--- src/code-stubs.h	(revision 3149)
+++ src/code-stubs.h	(working copy)
@@ -75,6 +75,7 @@
 #define DEF_ENUM(name) name,
     CODE_STUB_LIST(DEF_ENUM)
 #undef DEF_ENUM
+    NoCache,  // marker for stubs that do custom caching
     NUMBER_OF_IDS
   };
 
@@ -91,6 +92,12 @@
 
   virtual ~CodeStub() {}
 
+  // Override these methods to provide a custom caching mechanism for
+  // an individual type of code stub.
+  virtual bool GetCustomCache(Code** code_out) { return false; }
+  virtual void SetCustomCache(Code* value) { }
+  virtual bool has_custom_cache() { return false; }
+
  protected:
   static const int kMajorBits = 5;
   static const int kMinorBits = kBitsPerInt - kSmiTagSize - kMajorBits;