Refactor GetCodeCopyFromTemplate to get a single point where objects are replaced in code.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 75ff8393e06c3dcb02608c1e2c35ff1e39f00454..d9a90442f9ac733b22ae2a73e093463862efb76b 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -4591,6 +4591,24 @@ bool Code::IsWeakObjectInOptimizedCode(Object* object) {
 }
 
 
+class Code::FindAndReplacePattern {
+ public:
+  FindAndReplacePattern() : count_(0) { }
+  void Add(Handle<Map> map_to_find, Handle<Object> obj_to_replace) {
+    ASSERT(count_ < kMaxCount);
+    find_[count_] = map_to_find;
+    replace_[count_] = obj_to_replace;
+    ++count_;
+  }
+ private:
+  static const int kMaxCount = 4;
+  int count_;
+  Handle<Map> find_[kMaxCount];
+  Handle<Object> replace_[kMaxCount];
+  friend class Code;
+};
+
+
 Object* Map::prototype() {
   return READ_FIELD(this, kPrototypeOffset);
 }