ash: Use different hit-test outer-region for mouse and touch events.

ui/aura/window.cc

Index: ui/aura/window.cc
diff --git a/ui/aura/window.cc b/ui/aura/window.cc
index d125da17555e99eff9576441feca48955bd0b5ab..22d1fdc7a4df2a2b4f5f0f3dc72dcd91657f5da3 100644
--- a/ui/aura/window.cc
+++ b/ui/aura/window.cc
@@ -495,7 +495,9 @@ bool Window::HitTest(const gfx::Point& local_point) {
   // Expand my bounds for hit testing (override is usually zero but it's
   // probably cheaper to do the math every time than to branch).
   gfx::Rect local_bounds(gfx::Point(), bounds().size());
-  local_bounds.Inset(hit_test_bounds_override_outer_);
+  local_bounds.Inset(aura::Env::GetInstance()->is_touch_down() ?
+      hit_test_bounds_override_outer_touch_ :
+      hit_test_bounds_override_outer_mouse_);
 
   if (!delegate_ || !delegate_->HasHitTestMask())
     return local_bounds.Contains(local_point);