Remove special charAt and charCodeAt handling in the ICs.

src/stub-cache.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 885 matching lines @@
                                  Label* miss);
   friend class BaseLoadStoreStubCompiler;
 };
 
 
 // Subset of FUNCTIONS_WITH_ID_LIST with custom constant/global call
 // IC stubs.
 #define CUSTOM_CALL_IC_GENERATORS(V)            \
   V(ArrayPush)                                  \
   V(ArrayPop)                                   \
-  V(StringCharCodeAt)                           \
-  V(StringCharAt)                               \
   V(StringFromCharCode)                         \
   V(MathFloor)                                  \
   V(MathAbs)
 
 
 class CallStubCompiler: public StubCompiler {
  public:
   CallStubCompiler(Isolate* isolate,
                    int argc,
                    Code::Kind kind,
@@ skipping 150 matching lines @@
   Handle<JSFunction> constant_function_;
   bool is_simple_api_call_;
   Handle<FunctionTemplateInfo> expected_receiver_type_;
   Handle<CallHandlerInfo> api_call_info_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_STUB_CACHE_H_