[CRD iOS] Ignore touch event when the touch point is out of the canvas in direct input mode

remoting/client/ui/gesture_interpreter.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_UI_GESTURE_INTERPRETER_H_
 #define REMOTING_CLIENT_UI_GESTURE_INTERPRETER_H_
 
 #include <memory>
 
 #include "remoting/client/ui/desktop_viewport.h"
@@ skipping 73 matching lines @@
 
   void InjectMouseClick(float x,
                         float y,
                         protocol::MouseEvent_MouseButton button);
 
   void InjectCursorPosition(float x, float y);
 
   void SetGestureInProgress(InputStrategy::Gesture gesture,
                             bool is_in_progress);
 
-  // Tracks the touch point and gets back the cursor position from the input
-  // strategy.
-  ViewMatrix::Point TrackAndGetPosition(float touch_x, float touch_y);
-
   // Starts the given feedback at (cursor_x, cursor_y) if the feedback radius
   // is non-zero.
   void StartInputFeedback(float cursor_x,
                           float cursor_y,
                           InputStrategy::InputFeedbackType feedback_type);
 
   InputMode input_mode_ = UNDEFINED_INPUT_MODE;
   std::unique_ptr<InputStrategy> input_strategy_;
   DesktopViewport viewport_;
   RendererProxy* renderer_;
   ChromotingSession* input_stub_;
   InputStrategy::Gesture gesture_in_progress_;
 
   FlingAnimation pan_animation_;
   FlingAnimation scroll_animation_;
 
   // GestureInterpreter is neither copyable nor movable.
   GestureInterpreter(const GestureInterpreter&) = delete;
   GestureInterpreter& operator=(const GestureInterpreter&) = delete;
 };
 
 }  // namespace remoting
 #endif  // REMOTING_CLIENT_UI_GESTURE_INTERPRETER_H_