Indicate whether a touch event will cause scrolling

ui/aura/window_event_dispatcher.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/aura/window_event_dispatcher.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 143 matching lines @@
   ui::MouseEvent event(ui::ET_MOUSE_EXITED, point, point, ui::EF_NONE,
                        ui::EF_NONE);
   return DispatchMouseEnterOrExit(event, ui::ET_MOUSE_EXITED);
 }
 
 void WindowEventDispatcher::ProcessedTouchEvent(ui::TouchEvent* event,
                                                 Window* window,
                                                 ui::EventResult result) {
   // TODO(tdresser): Move this to PreDispatchTouchEvent, to enable eager
   // gesture detection. See crbug.com/410280.
-  if (!ui::GestureRecognizer::Get()
-           ->ProcessTouchEventPreDispatch(*event, window)) {
+  if (!ui::GestureRecognizer::Get()->ProcessTouchEventPreDispatch(event,
+                                                                  window)) {
     return;
   }
 
   // Once we've fully migrated to the eager gesture detector, we won't need to
   // pass an event here.
   scoped_ptr<ui::GestureRecognizer::Gestures> gestures(
       ui::GestureRecognizer::Get()->ProcessTouchEventOnAsyncAck(
           *event, result, window));
   DispatchDetails details = ProcessGestures(gestures.get());
   if (details.dispatcher_destroyed)
@@ skipping 327 matching lines @@
       // need to pass an event here.
       ui::TouchEvent orig_event(static_cast<const ui::TouchEvent&>(event),
                                 static_cast<Window*>(event.target()),
                                 window());
 
       if (event.result() & ui::ER_CONSUMED)
         orig_event.StopPropagation();
 
       // TODO(tdresser): Move this to PreDispatchTouchEvent, to enable eager
       // gesture detection. See crbug.com/410280.
-      if (!ui::GestureRecognizer::Get()
-               ->ProcessTouchEventPreDispatch(orig_event,
-                                              static_cast<Window*>(target))) {
+      if (!ui::GestureRecognizer::Get()->ProcessTouchEventPreDispatch(
+              &orig_event, static_cast<Window*>(target))) {
         return details;
       }
 
       scoped_ptr<ui::GestureRecognizer::Gestures> gestures;
 
       gestures.reset(
           ui::GestureRecognizer::Get()->ProcessTouchEventPostDispatch(
               orig_event, event.result(), static_cast<Window*>(target)));
 
       return ProcessGestures(gestures.get());
@@ skipping 372 matching lines @@
 
     default:
       NOTREACHED();
       break;
   }
 
   PreDispatchLocatedEvent(target, event);
 }
 
 }  // namespace aura