Move function prototype handling into a special handler rather than IC

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index 973818470d9778dfc42a5efe61063d13e26a4329..f50abda45ff23227cc6d03723b62dde3d5748cfc 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -899,14 +899,26 @@ class CallIC_ArrayStub: public CallICStub {
 };
 
 
-class FunctionPrototypeStub: public ICStub {
+// TODO(verwaest): Translate to hydrogen code stub.
+class FunctionPrototypeStub : public PlatformCodeStub {
  public:
   FunctionPrototypeStub(Isolate* isolate, Code::Kind kind)
-      : ICStub(isolate, kind) { }
+      : PlatformCodeStub(isolate) {
+    bit_field_ = KindBits::encode(kind);
+  }
   virtual void Generate(MacroAssembler* masm);
+  virtual Code::Kind GetCodeKind() const { return Code::HANDLER; }
+  virtual InlineCacheState GetICState() { return MONOMORPHIC; }
+  virtual ExtraICState GetExtraICState() const { return kind(); }
+
+ protected:
+  class KindBits : public BitField<Code::Kind, 0, 4> {};
+  virtual Code::Kind kind() const { return KindBits::decode(bit_field_); }
 
  private:
   virtual CodeStub::Major MajorKey() const { return FunctionPrototype; }
+  virtual int MinorKey() const { return bit_field_; }
+  int bit_field_;
 };