Move function prototype handling into a special handler rather than IC

src/code-stubs.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 881 matching lines @@
 
   virtual void Generate(MacroAssembler* masm);
 
  protected:
   virtual void PrintState(OStream& os) const V8_OVERRIDE;  // NOLINT
 
   virtual CodeStub::Major MajorKey() const { return CallIC_Array; }
 };
 
 
-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_;
 };
 
 
 class StoreICStub: public ICStub {
  public:
   StoreICStub(Isolate* isolate, Code::Kind kind, StrictMode strict_mode)
       : ICStub(isolate, kind), strict_mode_(strict_mode) { }
 
  protected:
   virtual ExtraICState GetExtraICState() const {
@@ skipping 1636 matching lines @@
 
 
 class CallDescriptors {
  public:
   static void InitializeForIsolate(Isolate* isolate);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_