[ic] Remove unnecessary access rights checks from the IC handlers.

src/x64/macro-assembler-x64.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_X64_MACRO_ASSEMBLER_X64_H_
 #define V8_X64_MACRO_ASSEMBLER_X64_H_
 
 #include "src/assembler.h"
 #include "src/bailout-reason.h"
 #include "src/base/flags.h"
@@ skipping 1271 matching lines @@
 
   // Push a new stack handler and link it into stack handler chain.
   void PushStackHandler();
 
   // Unlink the stack handler on top of the stack from the stack handler chain.
   void PopStackHandler();
 
   // ---------------------------------------------------------------------------
   // Inline caching support
 
-  // Generate code for checking access rights - used for security checks
-  // on access to global objects across environments. The holder register
-  // is left untouched, but the scratch register and kScratchRegister,
-  // which must be different, are clobbered.
-  void CheckAccessGlobalProxy(Register holder_reg,
-                              Register scratch,
-                              Label* miss);
-
   void GetNumberHash(Register r0, Register scratch);
 
   // ---------------------------------------------------------------------------
   // Allocation support
 
   // Allocate an object in new space or old space. If the given space
   // is exhausted control continues at the gc_required label. The allocated
   // object is returned in result and end of the new object is returned in
   // result_end. The register scratch can be passed as no_reg in which case
   // an additional object reference will be added to the reloc info. The
@@ skipping 458 matching lines @@
 inline Operand StackOperandForReturnAddress(int32_t disp) {
   return Operand(rsp, disp);
 }
 
 #define ACCESS_MASM(masm) masm->
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_X64_MACRO_ASSEMBLER_X64_H_