Remove special charAt and charCodeAt handling in the ICs.

src/code-stubs.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1069 matching lines @@
       Isolate* isolate,
       CodeStubInterfaceDescriptor* descriptor);
 
   virtual Handle<Code> GenerateCode(Isolate* isolate);
 
  private:
   virtual int NotMissMinorKey() {
     return GetExtraICState() | ArgcBits::encode(argc_);
   }
 
-  // We have to start storing extra ic bits at 1, because calls use bit zero
-  // for string stub state.
-  STATIC_ASSERT(CallICBase::StringStubState::kShift == 0);
-  STATIC_ASSERT(CallICBase::StringStubState::kSize == 1);
-  class HoleyBits: public BitField<bool, 1, 1> {};
-  STATIC_ASSERT(Code::kArgumentsBits <= kStubMinorKeyBits - 2);
-  class ArgcBits: public BitField<int, 2, Code::kArgumentsBits> {};
+  class HoleyBits: public BitField<bool, 0, 1> {};
+  STATIC_ASSERT(Code::kArgumentsBits <= kStubMinorKeyBits - 1);
+  class ArgcBits: public BitField<int, 1, Code::kArgumentsBits> {};
   virtual CodeStub::Major MajorKey() { return KeyedArrayCall; }
   int bit_field_;
   int argc_;
 };
 
 
 class BinaryOpICStub : public HydrogenCodeStub {
  public:
   BinaryOpICStub(Token::Value op, OverwriteMode mode)
       : HydrogenCodeStub(UNINITIALIZED), state_(op, mode) {}
@@ skipping 1363 matching lines @@
 
 
 class CallDescriptors {
  public:
   static void InitializeForIsolate(Isolate* isolate);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_