Added multi-finger gestures to touch_exploration_controller

ui/chromeos/touch_exploration_controller.h

 // Copyright 2014 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 UI_CHROMEOS_TOUCH_EXPLORATION_CONTROLLER_H_
 #define UI_CHROMEOS_TOUCH_EXPLORATION_CONTROLLER_H_
 
 #include "base/time/tick_clock.h"
 #include "base/timer/timer.h"
 #include "base/values.h"
@@ skipping 323 matching lines @@
   // SCREEN_CENTER.
   int FindEdgesWithinBounds(gfx::Point point, float bounds);
 
   void VlogState(const char* function_name);
 
   void VlogEvent(const ui::TouchEvent& event, const char* function_name);
 
   // Gets enum name from integer value.
   const char* EnumStateToString(State state);
 
+  // Maps each single/multi finger swipe to the function that dispatches
+  // the corresponding key events.
+  void InitializeSwipeClosures();

[aboxhall, 2014/08/05 23:43:42]

I think the fact that they're closures is an implementation detail; I'd call
this something like InitializeSwipeGestureMaps().

[evy, 2014/08/05 23:51:18]

Done.

+
   aura::Window* root_window_;
 
   // Handles volume control. Not owned.
   ui::TouchExplorationControllerDelegate* delegate_;
 
   // A set of touch ids for fingers currently touching the screen.
   std::vector<int> current_touch_ids_;
 
   // Map of touch ids to their last known location.
   std::map<int, gfx::PointF> touch_locations_;
@@ skipping 40 matching lines @@
   // A copy of the previous event passed.
   scoped_ptr<ui::TouchEvent> prev_event_;
 
   // This toggles whether VLOGS are turned on or not.
   bool VLOG_on_;
 
   // When touch_exploration_controller gets time relative to real time during
   // testing, this clock is set to the simulated clock and used.
   base::TickClock* tick_clock_;
 
+  // Maps swipes with the resulting functions that dispatch key events.
+  std::map<int, base::Closure> left_swipe_gestures_;
+  std::map<int, base::Closure> right_swipe_gestures_;
+  std::map<int, base::Closure> up_swipe_gestures_;
+  std::map<int, base::Closure> down_swipe_gestures_;
+
   DISALLOW_COPY_AND_ASSIGN(TouchExplorationController);
 };
 
 }  // namespace ui
 
 #endif  // UI_CHROMEOS_TOUCH_EXPLORATION_CONTROLLER_H_