First crack at implementing the touch explaration mode.

ui/aura/window_event_dispatcher.cc

Index: ui/aura/window_event_dispatcher.cc
diff --git a/ui/aura/window_event_dispatcher.cc b/ui/aura/window_event_dispatcher.cc
index 5489596ac8352160d3d4fd1199a3e2259bd36bb1..8e9a891593649627bc6336cf569205b4c9bd51c4 100644
--- a/ui/aura/window_event_dispatcher.cc
+++ b/ui/aura/window_event_dispatcher.cc
@@ -162,6 +162,7 @@ void WindowEventDispatcher::DispatchMouseExitAtPoint(const gfx::Point& point) {
 void WindowEventDispatcher::ProcessedTouchEvent(ui::TouchEvent* event,
                                                 Window* window,
                                                 ui::EventResult result) {
+  LOG(ERROR) << "WED::ProcessedTouchEvent, type=" << event->type();
   scoped_ptr<ui::GestureRecognizer::Gestures> gestures;
   gestures.reset(ui::GestureRecognizer::Get()->
       ProcessTouchEventForGesture(*event, result, window));