[CRD iOS] Add support for three-finger gestures

remoting/client/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_GESTURE_INTERPRETER_H_
 #define REMOTING_CLIENT_GESTURE_INTERPRETER_H_
 
 #include <memory>
 
 #include "remoting/client/input/input_strategy.h"
@@ skipping 36 matching lines @@
   // Called whenever the user did a pan gesture. It can be one-finger pan, no
   // matter dragging in on or not, or two-finger pan in conjunction with zoom.
   // Two-finger pan without zoom is consider a scroll gesture.
   void Pan(float translation_x, float translation_y);
 
   // Called when the user did a one-finger tap.
   void Tap(float x, float y);
 
   void TwoFingerTap(float x, float y);
 
+  void ThreeFingerTap(float x, float y);
+
   // Caller is expected to call both Pan() and Drag() when dragging is in
   // progress.
   void Drag(float x, float y, GestureState state);
 
   // Called when the user has just done a one-finger pan (no dragging or
   // zooming) and the pan gesture still has some final velocity.
   void OneFingerFling(float velocity_x, float velocity_y);
 
   // Called during a two-finger scroll (panning without zooming) gesture.
   void Scroll(float x, float y, float dx, float dy);
 
   // Called when the user has just done a scroll gesture and the scroll gesture
   // still has some final velocity.
   void ScrollWithVelocity(float velocity_x, float velocity_y);
 
   // Called to process one animation frame.
   void ProcessAnimations();
 
   void OnSurfaceSizeChanged(int width, int height);
   void OnDesktopSizeChanged(int width, int height);
 
  private:
   void PanWithoutAbortAnimations(float translation_x, float translation_y);
 
   void ScrollWithoutAbortAnimations(float dx, float dy);
 
   void AbortAnimations();
 
-  void InjectMouseClick(float x,
-                        float y,
+  // Injects the mouse click event and shows the touch feedback.
+  void InjectMouseClick(float touch_x,
+                        float touch_y,
                         protocol::MouseEvent_MouseButton button);
 
   void InjectCursorPosition(float x, float y);
 
   void SetGestureInProgress(InputStrategy::Gesture gesture,
                             bool is_in_progress);
 
   // Starts the given feedback at (cursor_x, cursor_y) if the feedback radius
   // is non-zero.
   void StartInputFeedback(float cursor_x,
@@ skipping 10 matching lines @@
   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_GESTURE_INTERPRETER_H_