Revert of Revert of [strong] Implement strong mode restrictions on property access

src/ic/handler-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_HANDLER_COMPILER_H_
 #define V8_IC_HANDLER_COMPILER_H_
 
 #include "src/ic/access-compiler.h"
 #include "src/ic/ic-state.h"
 
@@ skipping 128 matching lines @@
   Handle<Code> CompileLoadViaGetter(Handle<Name> name, int accessor_index,
                                     int expected_arguments);
 
   Handle<Code> CompileLoadGlobal(Handle<PropertyCell> cell, Handle<Name> name,
                                  bool is_configurable);
 
   // Static interface
   static Handle<Code> ComputeLoadNonexistent(Handle<Name> name,
                                              Handle<Map> map);
 
+  static void GenerateSlow(MacroAssembler* masm);
+
   static void GenerateLoadViaGetter(MacroAssembler* masm, Handle<Map> map,
                                     Register receiver, Register holder,
                                     int accessor_index, int expected_arguments,
                                     Register scratch);
 
   static void GenerateLoadViaGetterForDeopt(MacroAssembler* masm) {
     GenerateLoadViaGetter(masm, Handle<Map>::null(), no_reg, no_reg, -1, -1,
                           no_reg);
   }
 
@@ skipping 124 matching lines @@
 class ElementHandlerCompiler : public PropertyHandlerCompiler {
  public:
   explicit ElementHandlerCompiler(Isolate* isolate)
       : PropertyHandlerCompiler(isolate, Code::KEYED_LOAD_IC,
                                 Handle<Map>::null(), Handle<JSObject>::null(),
                                 kCacheOnReceiver) {}
 
   virtual ~ElementHandlerCompiler() {}
 
   void CompileElementHandlers(MapHandleList* receiver_maps,
-                              CodeHandleList* handlers);
+                              CodeHandleList* handlers,
+                              LanguageMode language_mode);
 
+  static void GenerateLoadSlow(MacroAssembler* masm);
   static void GenerateStoreSlow(MacroAssembler* masm);
 };
 }
 }  // namespace v8::internal
 
 #endif  // V8_IC_HANDLER_COMPILER_H_