Fix build problems on Windows 64-bit by casting.

src/profile-generator.cc

 // Copyright 2010 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 309 matching lines @@
   return true;
 }
 
 
 bool CpuProfilesCollection::StartProfiling(String* title, unsigned uid) {
   return StartProfiling(GetName(title), uid);
 }
 
 
 CpuProfile* CpuProfilesCollection::StopProfiling(const char* title) {
-  const int title_len = strlen(title);
+  const int title_len = StrLength(title);
   CpuProfile* profile = NULL;
   current_profiles_semaphore_->Wait();
   for (int i = current_profiles_.length() - 1; i >= 0; --i) {
     if (title_len == 0 || strcmp(current_profiles_[i]->title(), title) == 0) {
       profile = current_profiles_.Remove(i);
       break;
     }
   }
   current_profiles_semaphore_->Signal();
 
@@ skipping 175 matching lines @@
     // Put VM state as the topmost entry.
     *entry++ = EntryForVMState(sample.state);
   }
 
   profiles_->AddPathToCurrentProfiles(entries);
 }
 
 } }  // namespace v8::internal
 
 #endif  // ENABLE_CPP_PROFILES_PROCESSOR