Replace our home-grown BitCast with bit_cast from Chrome/Google3.

src/arm/simulator-arm.cc

 // 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.
 
 #include <stdarg.h>
 #include <stdlib.h>
 #include <cmath>
 
 #include "src/v8.h"
 
@@ skipping 293 matching lines @@
                   i < 8 &&
                   (i % 2) == 0) {
                 dvalue = GetRegisterPairDoubleValue(i);
                 PrintF(" (%f)\n", dvalue);
               } else {
                 PrintF("\n");
               }
             }
             for (int i = 0; i < DwVfpRegister::NumRegisters(); i++) {
               dvalue = GetVFPDoubleRegisterValue(i);
-              uint64_t as_words = BitCast<uint64_t>(dvalue);
+              uint64_t as_words = bit_cast<uint64_t>(dvalue);
               PrintF("%3s: %f 0x%08x %08x\n",
                      VFPRegisters::Name(i, true),
                      dvalue,
                      static_cast<uint32_t>(as_words >> 32),
                      static_cast<uint32_t>(as_words & 0xffffffff));
             }
           } else {
             if (GetValue(arg1, &value)) {
               PrintF("%s: 0x%08x %d \n", arg1, value, value);
             } else if (GetVFPSingleValue(arg1, &svalue)) {
-              uint32_t as_word = BitCast<uint32_t>(svalue);
+              uint32_t as_word = bit_cast<uint32_t>(svalue);
               PrintF("%s: %f 0x%08x\n", arg1, svalue, as_word);
             } else if (GetVFPDoubleValue(arg1, &dvalue)) {
-              uint64_t as_words = BitCast<uint64_t>(dvalue);
+              uint64_t as_words = bit_cast<uint64_t>(dvalue);
               PrintF("%s: %f 0x%08x %08x\n",
                      arg1,
                      dvalue,
                      static_cast<uint32_t>(as_words >> 32),
                      static_cast<uint32_t>(as_words & 0xffffffff));
             } else {
               PrintF("%s unrecognized\n", arg1);
             }
           }
         } else {
@@ skipping 3493 matching lines @@
   uintptr_t address = *stack_slot;
   set_register(sp, current_sp + sizeof(uintptr_t));
   return address;
 }
 
 } }  // namespace v8::internal
 
 #endif  // USE_SIMULATOR
 
 #endif  // V8_TARGET_ARCH_ARM