Trigger inline settings on notifications by long tap.

The inline settings should be triggered by long tap.

BUG=818734
TEST=manual

Change-Id: Ieeb7a0c009b15157bd90c823ece84ed39bf676eb
Reviewed-on: https://chromium-review.googlesource.com/950504Reviewed-by: Tetsui Ohkubo <tetsui@chromium.org>
Reviewed-by: Yoshiki Iguchi <yoshiki@chromium.org>
Commit-Queue: Megumi Hattori <megumihattori@google.com>
Cr-Commit-Position: refs/heads/master@{#541730}

ui/message_center/views/notification_view_md.cc

@@ -776,6 +776,14 @@ void NotificationViewMD::OnMouseEvent(ui::MouseEvent* event) {
   View::OnMouseEvent(event);
 }
 
+void NotificationViewMD::OnGestureEvent(ui::GestureEvent* event) {
+  if (event->type() == ui::ET_GESTURE_LONG_TAP) {
+    ToggleInlineSettings(*event->AsLocatedEvent());
+    return;
+  }
+  MessageView::OnGestureEvent(event);
+}
+
 void NotificationViewMD::UpdateWithNotification(
     const Notification& notification) {
   MessageView::UpdateWithNotification(notification);
@@ -1353,7 +1361,7 @@ void NotificationViewMD::Activate() {
 void NotificationViewMD::AddBackgroundAnimation(const ui::LocatedEvent& event) {
   header_row_->SetSubpixelRenderingEnabled(false);
 
-  SetInkDropMode(InkDropMode::ON);
+  SetInkDropMode(InkDropMode::ON_NO_GESTURE_HANDLER);
 
   // Convert the point of |event| from the coordinate system of
   // |control_buttons_view_| to that of NotificationViewMD, create a new

ui/message_center/views/notification_view_md.h

@@ -234,6 +234,7 @@ class MESSAGE_CENTER_EXPORT NotificationViewMD
   gfx::NativeCursor GetCursor(const ui::MouseEvent& event) override;
   bool OnMousePressed(const ui::MouseEvent& event) override;
   void OnMouseEvent(ui::MouseEvent* event) override;
+  void OnGestureEvent(ui::GestureEvent* event) override;
 
   // Overridden from views::InkDropHostView:
   void AddInkDropLayer(ui::Layer* ink_drop_layer) override;