Fix build problems on Windows 64-bit by casting.

test/cctest/test-cpu-profiler.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 //
 // Tests of profiles generator and utilities.
 
 #ifdef ENABLE_CPP_PROFILES_PROCESSOR
 
 #include "v8.h"
 #include "cpu-profiler-inl.h"
 #include "cctest.h"
 
@@ skipping 77 matching lines @@
   ProfilerEventsProcessor processor(&generator);
   processor.Start();
   while (!processor.running()) {
     i::Thread::YieldCPU();
   }
 
   // Enqueue code creation events.
   i::HandleScope scope;
   const char* aaa_str = "aaa";
   i::Handle<i::String> aaa_name = i::Factory::NewStringFromAscii(
-      i::Vector<const char>(aaa_str, strlen(aaa_str)));
+      i::Vector<const char>(aaa_str, i::StrLength(aaa_str)));
   processor.CodeCreateEvent(i::Logger::FUNCTION_TAG,
                             *aaa_name,
                             i::Heap::empty_string(),
                             0,
                             ToAddress(0x1000),
                             0x100);
   processor.CodeCreateEvent(i::Logger::BUILTIN_TAG,
                             "bbb",
                             ToAddress(0x1200),
                             0x80);
@@ skipping 107 matching lines @@
       bottom_up_root_children[2]->children();
   CHECK_EQ(1, bottom_up_ddd_children->length());
   CHECK_EQ("5", bottom_up_ddd_children->last()->entry()->name());
   const i::List<ProfileNode*>* bottom_up_ddd_stub_children =
       bottom_up_ddd_children->last()->children();
   CHECK_EQ(1, bottom_up_ddd_stub_children->length());
   CHECK_EQ("bbb", bottom_up_ddd_stub_children->last()->entry()->name());
 }
 
 #endif  // ENABLE_CPP_PROFILES_PROCESSOR