Implement Non-Closable Notification

ui/message_center/views/message_list_view.cc

 // Copyright (c) 2015 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 "base/command_line.h"
 #include "ui/gfx/animation/slide_animation.h"
 #include "ui/message_center/message_center_style.h"
 #include "ui/message_center/message_center_switches.h"
 #include "ui/message_center/views/message_center_view.h"
 #include "ui/message_center/views/message_list_view.h"
@@ skipping 173 matching lines @@
     animator_.Cancel();
     STLDeleteContainerPointers(deleting_views_.begin(), deleting_views_.end());
     deleting_views_.clear();
     adding_views_.clear();
   }
 
   reposition_top_ = -1;
   fixed_height_ = 0;
 }
 
-void MessageListView::ClearAllNotifications(
+void MessageListView::ClearAllClosableNotifications(

[dewittj, 2016/02/08 18:02:34]

How does the clear-all animation look when there are some non-closable
notifications visible in the message center when you hit the clear all button? 
Since you skipp the closable one, you may need some more animations to signal
that this one is not getting closed.

[yoshiki, 2016/02/09 23:42:25]

Android dosen't have any animation for non-closable notifications. So I think
it's ok. WDYT? 

[dewittj, 2016/02/10 00:03:15]

Does the ChromeOS notification center close itself if clear-all is pressed with
a pinned notification, or does it remain open?

     const gfx::Rect& visible_scroll_rect) {
   for (int i = 0; i < child_count(); ++i) {
-    views::View* child = child_at(i);
+    // Safe cast since all views in MessageListView are MessageViews.
+    MessageView* child = (MessageView*)child_at(i);
     if (!child->visible())
       continue;
     if (gfx::IntersectRects(child->bounds(), visible_scroll_rect).IsEmpty())
       continue;
+    if (!child->IsClosable())
+      continue;
     clearing_all_views_.push_back(child);
   }
-  DoUpdateIfPossible();
+  if (clearing_all_views_.empty()) {
+    message_center_view()->OnAllNotificationsCleared();
+  } else {
+    DoUpdateIfPossible();
+  }
 }
 
 void MessageListView::OnBoundsAnimatorProgressed(
     views::BoundsAnimator* animator) {
   DCHECK_EQ(&animator_, animator);
   for (std::set<views::View*>::iterator iter = deleted_when_done_.begin();
        iter != deleted_when_done_.end(); ++iter) {
     const gfx::SlideAnimation* animation = animator->GetAnimationForView(*iter);
     if (animation)
       (*iter)->layer()->SetOpacity(animation->CurrentValueBetween(1.0, 0.0));
@@ skipping 240 matching lines @@
         base::TimeDelta::FromMilliseconds(
             kAnimateClearingNextNotificationDelayMS));
   }
 }
 
 void MessageListView::SetRepositionTargetForTest(const gfx::Rect& target_rect) {
   SetRepositionTarget(target_rect);
 }
 
 }  // namespace message_center