Make toasts notice when they're hidden and send the mouse-out event.

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 "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 230 matching lines @@
   OnBoundsAnimationEndedOrCancelled(animation);
 }
 
 // views::WidgetDelegate
 views::View* ToastContentsView::GetContentsView() {
   return this;
 }
 
 void ToastContentsView::WindowClosing() {
   if (!is_closing_ && collection_)
     collection_->RemoveToast(this);

[sadrul, 2013/08/30 17:18:31]

I think it makes more sense for RemoveToast() to reset its states correctly,
than to override VisibilityChanged()?

[dewittj, 2013/08/30 17:29:24]

Done.

 }
 
 bool ToastContentsView::CanActivate() const {
 #if defined(OS_WIN) && defined(USE_AURA)
   return true;
 #else
   return false;
 #endif
 }
 
@@ skipping 27 matching lines @@
 void ToastContentsView::OnMouseEntered(const ui::MouseEvent& event) {
   if (collection_)
     collection_->OnMouseEntered(this);
 }
 
 void ToastContentsView::OnMouseExited(const ui::MouseEvent& event) {
   if (collection_)
     collection_->OnMouseExited(this);
 }
 
+void ToastContentsView::VisibilityChanged(
+    View* starting_from, bool is_visible) {
+  if (!is_visible && collection_)
+    collection_->OnMouseExited(this);
+}
+
 void ToastContentsView::Layout() {
   if (child_count() > 0) {
     child_at(0)->SetBounds(
         0, 0, preferred_size_.width(), preferred_size_.height());
   }
 }
 
 gfx::Size ToastContentsView::GetPreferredSize() {
   return child_count() ? GetToastSizeForView(child_at(0)) : gfx::Size();
 }
 
 void ToastContentsView::GetAccessibleState(ui::AccessibleViewState* state) {
   if (child_count() > 0)
     child_at(0)->GetAccessibleState(state);
   state->role = ui::AccessibilityTypes::ROLE_WINDOW;
 }
 
 gfx::Rect ToastContentsView::GetClosedToastBounds(gfx::Rect bounds) {
   return gfx::Rect(bounds.x() + bounds.width() - kClosedToastWidth,
                    bounds.y(),
                    kClosedToastWidth,
                    bounds.height());
 }
 
 }  // namespace message_center