Expose native, desktop and mobile gesture detection defaults

ui/chromeos/touch_exploration_controller.cc

 // 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.
 
 #include "ui/chromeos/touch_exploration_controller.h"
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/default_tick_clock.h"
 #include "ui/aura/client/cursor_client.h"
@@ skipping 131 matching lines @@
       return ui::EVENT_REWRITE_DISCARD;
     }
   }
 
   // If the user is in a gesture state, or if there is a possiblity that the
   // user will enter it in the future, we send the event to the gesture
   // provider so it can keep track of the state of the fingers. When the user
   // leaves one of these states, SET_STATE will set the gesture provider to
   // NULL.
   if (gesture_provider_.get()) {
-    gesture_provider_->OnTouchEvent(touch_event);
-    gesture_provider_->OnSyncTouchEventAck(touch_event.unique_event_id(),
-                                           false);
+    ui::TouchEvent mutable_touch_event(touch_event,
+                                       static_cast<aura::Window*>(nullptr),
+                                       static_cast<aura::Window*>(nullptr));

[sadrul, 2014/12/15 17:40:46]

Can you just do: mutable_touch_event = touch_event;?

[jdduke (slow), 2014/12/15 18:37:37]

Hmm, much better, I guess assignment works but not the copy constructor.

+    gesture_provider_->OnTouchEvent(&mutable_touch_event);
+    gesture_provider_->OnSyncTouchEventAck(
+        mutable_touch_event.unique_event_id(), false);
     ProcessGestureEvents();
   }
 
   // The rest of the processing depends on what state we're in.
   switch (state_) {
     case NO_FINGERS_DOWN:
       return InNoFingersDown(touch_event, rewritten_event);
     case SINGLE_TAP_PRESSED:
       return InSingleTapPressed(touch_event, rewritten_event);
     case SINGLE_TAP_RELEASED:
@@ skipping 983 matching lines @@
   up_swipe_gestures_[4] = BindKeyEventWithFlags(VKEY_BROWSER_HOME, ui::EF_NONE);
   down_swipe_gestures_[4] =
       BindKeyEventWithFlags(VKEY_BROWSER_REFRESH, ui::EF_NONE);
 }
 
 float TouchExplorationController::GetSplitTapTouchSlop() {
   return gesture_detector_config_.touch_slop * 3;
 }
 
 }  // namespace ui