Move platform abstraction to base library

src/arm64/disasm-arm64.cc

 // Copyright 2013 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.
 
 #include <assert.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/arm64/decoder-arm64-inl.h"
 #include "src/arm64/disasm-arm64.h"
+#include "src/base/platform/platform.h"
 #include "src/disasm.h"
 #include "src/macro-assembler.h"
-#include "src/platform.h"
 
 namespace v8 {
 namespace internal {
 
 
 Disassembler::Disassembler() {
   buffer_size_ = 256;
   buffer_ = reinterpret_cast<char*>(malloc(buffer_size_));
   buffer_pos_ = 0;
   own_buffer_ = true;
@@ skipping 1794 matching lines @@
   decoder.AppendVisitor(&disasm);
 
   for (byte* pc = start; pc < end; pc += v8::internal::kInstructionSize) {
     decoder.Decode(reinterpret_cast<v8::internal::Instruction*>(pc));
   }
 }
 
 }  // namespace disasm
 
 #endif  // V8_TARGET_ARCH_ARM64