Move code that doesn't depend on PPAPI out of remoting/client/plugin

remoting/client/normalizing_input_filter_cros.h

Index: remoting/client/normalizing_input_filter_cros.h
diff --git a/remoting/client/plugin/normalizing_input_filter_cros.h b/remoting/client/normalizing_input_filter_cros.h
similarity index 89%
rename from remoting/client/plugin/normalizing_input_filter_cros.h
rename to remoting/client/normalizing_input_filter_cros.h
index c239dfcd391806c63baeb0a8494413c48ecca949..e20eb59d546ba8009112f0c4e899add487044a5b 100644
--- a/remoting/client/plugin/normalizing_input_filter_cros.h
+++ b/remoting/client/normalizing_input_filter_cros.h
@@ -1,10 +1,12 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "remoting/protocol/input_filter.h"
+#ifndef REMOTING_CLIENT_NORMALIZING_INPUT_FILTER_CROS_H_
+#define REMOTING_CLIENT_NORMALIZING_INPUT_FILTER_CROS_H_
 
 #include "remoting/proto/event.pb.h"
+#include "remoting/protocol/input_filter.h"
 
 namespace remoting {
 
@@ -59,3 +61,5 @@ class NormalizingInputFilterCros : public protocol::InputFilter {
 };
 
 }  // namespace remoting
+
+#endif  // REMOTING_CLIENT_NORMALIZING_INPUT_FILTER_CROS_H_