[d8] Fix V8 external snapshot for Windows.

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 1559 matching lines @@
     delete[] snapshot_.data;
   }
 
  private:
   static char* RelativePath(char** buffer, const char* exec_path,
                             const char* name) {
     DCHECK(exec_path);
     const char* last_slash = strrchr(exec_path, '/');
     if (last_slash) {
       int after_slash = last_slash - exec_path + 1;
-      int name_length = strlen(name);
+      int name_length = static_cast<int>(strlen(name));
       *buffer =
           reinterpret_cast<char*>(calloc(after_slash + name_length + 1, 1));
       strncpy(*buffer, exec_path, after_slash);
       strncat(*buffer, name, name_length);
     } else {
       *buffer = strdup(name);
     }
     return *buffer;
   }
 
@@ skipping 159 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif