Fix warnings on Win64.

test/cctest/test-utils.cc

 // Copyright 2006-2008 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 148 matching lines @@
   CHECK_EQ(-2, -8 >> 2);
   CHECK_EQ(-2, static_cast<int8_t>(-8) >> 2);
   CHECK_EQ(-2, static_cast<int>(static_cast<intptr_t>(-8) >> 2));
 }
 
 
 TEST(SNPrintF) {
   // Make sure that strings that are truncated because of too small
   // buffers are zero-terminated anyway.
   const char* s = "the quick lazy .... oh forget it!";
-  int length = strlen(s);
+  int length = StrLength(s);
   for (int i = 1; i < length * 2; i++) {
     static const char kMarker = static_cast<char>(42);
     Vector<char> buffer = Vector<char>::New(i + 1);
     buffer[i] = kMarker;
     int n = OS::SNPrintF(Vector<char>(buffer.start(), i), "%s", s);
     CHECK(n <= i);
     CHECK(n == length || n == -1);
     CHECK_EQ(0, strncmp(buffer.start(), s, i - 1));
     CHECK_EQ(kMarker, buffer[i]);
     if (i <= length) {
-      CHECK_EQ(i - 1, strlen(buffer.start()));
+      CHECK_EQ(i - 1, StrLength(buffer.start()));
     } else {
-      CHECK_EQ(length, strlen(buffer.start()));
+      CHECK_EQ(length, StrLength(buffer.start()));
     }
     buffer.Dispose();
   }
 }