Fix windows x64 build.

src/d8.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.
 
 
 // Defined when linking against shared lib on Windows.
 #if defined(USING_V8_SHARED) && !defined(V8_SHARED)
 #define V8_SHARED
 #endif
 
@@ skipping 1335 matching lines @@
   if (Shell::options.last_run) {
     thread_->Join();
   } else {
     done_semaphore_.Wait();
   }
 }
 #endif  // !V8_SHARED
 
 
 void SetFlagsFromString(const char* flags) {
-  v8::V8::SetFlagsFromString(flags, strlen(flags));
+  v8::V8::SetFlagsFromString(flags, static_cast<int>(strlen(flags)));
 }
 
 
 bool Shell::SetOptions(int argc, char* argv[]) {
   bool logfile_per_isolate = false;
   for (int i = 0; i < argc; i++) {
     // Turn '_' into '-'.
     // for (char* c = arg; *c != '\0'; c++) if (*c == '_') *c = '-';
     if (strcmp(argv[i], "--stress-opt") == 0) {
       options.stress_opt = true;
@@ skipping 361 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif