A64: Synchronize with r18084.

src/a64/assembler-a64.h

 // Copyright 2013 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 727 matching lines @@
 
   // Given the address of the beginning of a call, return the address in the
   // instruction stream that call will return from.
   inline static Address return_address_from_call_start(Address pc);
 
   // This sets the branch destination (which is in the constant pool on ARM).
   // This is for calls and branches within generated code.
   inline static void deserialization_set_special_target_at(
       Address constant_pool_entry, Address target);
 
-  // This sets the branch destination (which is in the constant pool on ARM).
-  // This is for calls and branches to runtime code.
-  inline static void set_external_target_at(Address constant_pool_entry,
-                                            Address target);
-
   // All addresses in the constant pool are the same size as pointers.
   static const int kSpecialTargetSize = kPointerSize;
 
   // The sizes of the call sequences emitted by MacroAssembler::Call.
   // Wherever possible, use MacroAssembler::CallSize instead of these constants,
   // as it will choose the correct value for a given relocation mode.
   //
   // Without relocation:
   //  movz  ip0, #(target & 0x000000000000ffff)
   //  movk  ip0, #(target & 0x00000000ffff0000)
@@ skipping 1286 matching lines @@
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBuffer();
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_A64_ASSEMBLER_A64_H_