Port count-based profiler to x64

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index 0cbd46ed1d7a0c190e29dd4225339b37199bbb01..db0c3b420c54c2bf113c446559e69842f5da0485 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -110,13 +110,6 @@ class JumpPatchSite BASE_EMBEDDED {
 };
 
 
-// TODO(jkummerow): Obsolete as soon as x64 is updated. Remove.
-int FullCodeGenerator::self_optimization_header_size() {
-  UNREACHABLE();
-  return 24;
-}
-
-
 // Generate code for a JS function.  On entry to the function the receiver
 // and arguments have been pushed on the stack left to right.  The actual
 // argument count matches the formal parameter count expected by the