Encapsulate megamorphic load/tail-call in hydrogen

src/ic/ic-compiler.h

 // Copyright 2014 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_IC_IC_COMPILER_H_
 #define V8_IC_IC_COMPILER_H_
 
 #include "src/ic/access-compiler.h"
 
 namespace v8 {
@@ skipping 54 matching lines @@
       : PropertyAccessCompiler(isolate, kind, cache_holder),
         extra_ic_state_(extra_ic_state) {}
 
   static Handle<Code> Find(Handle<Name> name, Handle<Map> stub_holder_map,
                            Code::Kind kind,
                            ExtraICState extra_ic_state = kNoExtraICState,
                            CacheHolderFlag cache_holder = kCacheOnReceiver);
 
   Handle<Code> CompileLoadInitialize(Code::Flags flags);
   Handle<Code> CompileLoadPreMonomorphic(Code::Flags flags);
-  Handle<Code> CompileLoadMegamorphic(Code::Flags flags);
   Handle<Code> CompileStoreInitialize(Code::Flags flags);
   Handle<Code> CompileStorePreMonomorphic(Code::Flags flags);
   Handle<Code> CompileStoreGeneric(Code::Flags flags);
   Handle<Code> CompileStoreMegamorphic(Code::Flags flags);
 
   Handle<Code> CompileMonomorphic(Handle<HeapType> type, Handle<Code> handler,
                                   Handle<Name> name, IcCheckType check);
   Handle<Code> CompilePolymorphic(TypeHandleList* types,
                                   CodeHandleList* handlers, Handle<Name> name,
                                   Code::StubType type, IcCheckType check);
@@ skipping 31 matching lines @@
   }
 
   const ExtraICState extra_ic_state_;
 };
 
 
 }
 }  // namespace v8::internal
 
 #endif  // V8_IC_IC_COMPILER_H_