[CRD iOS] Move UI stuff into a subdirectory

remoting/client/ui/input_strategy.h

 // Copyright 2017 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.
 
-#ifndef REMOTING_CLIENT_INPUT_STRATEGY_H_
-#define REMOTING_CLIENT_INPUT_STRATEGY_H_
+#ifndef REMOTING_CLIENT_UI_INPUT_STRATEGY_H_
+#define REMOTING_CLIENT_UI_INPUT_STRATEGY_H_
 
 namespace remoting {
 
 class DesktopViewport;
 
 // This is an interface used by GestureInterpreter to customize the way gestures
 // are handled.
 class InputStrategy {
  public:
   virtual ~InputStrategy() {}
@@ skipping 24 matching lines @@
                                    const DesktopViewport& viewport,
                                    float* cursor_x,
                                    float* cursor_y) = 0;
 
   // Returns true if the input strategy maintains a visible cursor on the
   // desktop.
   virtual bool IsCursorVisible() const = 0;
 };
 
 }  // namespace remoting
-#endif  // REMOTING_CLIENT_INPUT_STRATEGY_H_
+#endif  // REMOTING_CLIENT_UI_INPUT_STRATEGY_H_