Count-based profiling for primitive functions (hidden behind a flag)

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index 47eaeea3bcbe9231ae1cee1ae97a9085dc5034d8..788e5d19bd88c17948c17e258e6361649c3e9942 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -280,6 +280,9 @@ class Compiler : public AllStatic {
 
   static const int kMaxInliningLevels = 3;
 
+  // Call count before primitive functions trigger their own optimization.
+  static const int kCallsUntilPrimitiveOpt = 200;
+
   // All routines return a SharedFunctionInfo.
   // If an error occurs an exception is raised and the return handle
   // contains NULL.