Touch gestures for System Tray/ IME/ Stylus/ Notifications

ui/views/bubble/tray_bubble_view.cc

Index: ui/views/bubble/tray_bubble_view.cc
diff --git a/ui/views/bubble/tray_bubble_view.cc b/ui/views/bubble/tray_bubble_view.cc
index 46eebae8b028a3e95ceb7d357b08bfebfb71b686..69bfd1d0614b541a75627427f34ef78d92956aff 100644
--- a/ui/views/bubble/tray_bubble_view.cc
+++ b/ui/views/bubble/tray_bubble_view.cc
@@ -169,6 +169,34 @@ class BottomAlignedBoxLayout : public BoxLayout {
 using internal::TrayBubbleContentMask;
 using internal::BottomAlignedBoxLayout;
 
+TrayBubbleView::Delegate::~Delegate() {}
+
+void TrayBubbleView::Delegate::BubbleViewDestroyed() {}
+
+void TrayBubbleView::Delegate::OnMouseEnteredView() {}
+
+void TrayBubbleView::Delegate::OnMouseExitedView() {}
+
+void TrayBubbleView::Delegate::RegisterAccelerators(
+    const std::vector<ui::Accelerator>& accelerators,
+    TrayBubbleView* tray_bubble_view) {}
+
+void TrayBubbleView::Delegate::UnregisterAllAccelerators(
+    TrayBubbleView* tray_bubble_view) {}
+
+base::string16 TrayBubbleView::Delegate::GetAccessibleNameForBubble() {
+  return base::string16();
+}
+
+bool TrayBubbleView::Delegate::ShouldEnableExtraKeyboardAccessibility() {
+  return false;
+}
+
+void TrayBubbleView::Delegate::HideBubble(const TrayBubbleView* bubble_view) {}
+
+void TrayBubbleView::Delegate::ProcessGestureEventForBubble(
+    ui::GestureEvent* event) {}
+
 TrayBubbleView::InitParams::InitParams() = default;
 
 TrayBubbleView::InitParams::InitParams(const InitParams& other) = default;
@@ -393,6 +421,14 @@ void TrayBubbleView::GetAccessibleNodeData(ui::AXNodeData* node_data) {
   }
 }
 
+void TrayBubbleView::OnGestureEvent(ui::GestureEvent* event) {
+  if (delegate_)
+    delegate_->ProcessGestureEventForBubble(event);
+
+  if (!event->handled())
+    BubbleDialogDelegateView::OnGestureEvent(event);
+}
+
 void TrayBubbleView::MouseMovedOutOfHost() {
   // The mouse was accidentally over the bubble when it opened and the AutoClose
   // logic was not activated. Now that the user did move the mouse we tell the