Pause close timer of notification while it's active

ui/message_center/views/toast_contents_view.cc

 // Copyright (c) 2013 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/message_center/views/toast_contents_view.h"
 
 #include <memory>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 260 matching lines @@
     return;
 
   gfx::NativeView native_view = widget->GetNativeView();
   if (!native_view || !collection_.get())
     return;
 
   collection_->OnDisplayMetricsChanged(
       Screen::GetScreen()->GetDisplayNearestWindow(native_view));
 }
 
+void ToastContentsView::OnWidgetActivationChanged(views::Widget* widget,
+                                                  bool active) {
+  if (active)
+    collection_->PausePopupTimers();
+  else
+    collection_->RestartPopupTimers();
+}
+
 // views::View
 void ToastContentsView::OnMouseEntered(const ui::MouseEvent& event) {
   if (collection_)
     collection_->OnMouseEntered(this);
 }
 
 void ToastContentsView::OnMouseExited(const ui::MouseEvent& event) {
   if (collection_)
     collection_->OnMouseExited(this);
 }
@@ skipping 91 matching lines @@
   params.keep_on_top = true;
 #if defined(OS_LINUX) && !defined(OS_CHROMEOS)
   params.opacity = views::Widget::InitParams::OPAQUE_WINDOW;
 #else
   params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
 #endif
   params.delegate = this;
   views::Widget* widget = new views::Widget();
   alignment_delegate->ConfigureWidgetInitParamsForContainer(widget, &params);
   widget->set_focus_on_creation(false);
+  widget->AddObserver(this);
 
 #if defined(OS_WIN)
   // We want to ensure that this toast always goes to the native desktop,
   // not the Ash desktop (since there is already another toast contents view
   // there.
   if (!params.parent)
     params.native_widget = new views::DesktopNativeWidgetAura(widget);
 #endif
 
   widget->Init(params);
 }
 
 gfx::Rect ToastContentsView::GetClosedToastBounds(gfx::Rect bounds) {
   return gfx::Rect(bounds.x() + bounds.width() - kClosedToastWidth,
                    bounds.y(),
                    kClosedToastWidth,
                    bounds.height());
 }
 
 }  // namespace message_center