Remove duplicate application cpp files in mojo/application.

mojo/application/public/cpp/content_handler_factory.h

Index: mojo/application/public/cpp/content_handler_factory.h
diff --git a/mojo/application/content_handler_factory.h b/mojo/application/public/cpp/content_handler_factory.h
similarity index 92%
rename from mojo/application/content_handler_factory.h
rename to mojo/application/public/cpp/content_handler_factory.h
index 89a1c7cea4bb230962ddd7759e3d913cd6538556..f4bf3439ffce667631cdfac4ee4c63c8db454d53 100644
--- a/mojo/application/content_handler_factory.h
+++ b/mojo/application/public/cpp/content_handler_factory.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_APPLICATION_CONTENT_HANDLER_FACTORY_H_
-#define MOJO_APPLICATION_CONTENT_HANDLER_FACTORY_H_
+#ifndef MOJO_APPLICATION_PUBLIC_CPP_CONTENT_HANDLER_FACTORY_H_
+#define MOJO_APPLICATION_PUBLIC_CPP_CONTENT_HANDLER_FACTORY_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "mojo/application/public/cpp/interface_factory.h"
@@ -77,4 +77,4 @@ make_handled_factory_holder(A* value) {
 
 }  // namespace mojo
 
-#endif  // MOJO_APPLICATION_CONTENT_HANDLER_FACTORY_H_
+#endif  // MOJO_APPLICATION_PUBLIC_CPP_CONTENT_HANDLER_FACTORY_H_