Mojo: Move mojo/public/utility to mojo/public/cpp/utility.

mojo/public/cpp/utility/thread.h

Index: mojo/public/cpp/utility/thread.h
diff --git a/mojo/public/utility/thread.h b/mojo/public/cpp/utility/thread.h
similarity index 90%
rename from mojo/public/utility/thread.h
rename to mojo/public/cpp/utility/thread.h
index a527db772efb1272e31c1951d10123b61ace68ad..b7d10ee7037e4e628edeaf5445c3e9aac8af459d 100644
--- a/mojo/public/utility/thread.h
+++ b/mojo/public/cpp/utility/thread.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef MOJO_PUBLIC_UTILITY_THREAD_H_
-#define MOJO_PUBLIC_UTILITY_THREAD_H_
+#ifndef MOJO_PUBLIC_CPP_UTILITY_THREAD_H_
+#define MOJO_PUBLIC_CPP_UTILITY_THREAD_H_
 
 #ifdef _WIN32
 #error "Not implemented: See crbug.com/342893."
@@ -59,4 +59,4 @@ class Thread {
 
 }  // namespace mojo
 
-#endif  // MOJO_PUBLIC_UTILITY_THREAD_H_
+#endif  // MOJO_PUBLIC_CPP_UTILITY_THREAD_H_