Add unittests of ArcCustomNotificationView

ui/arc/notification/arc_custom_notification_view.cc

 // Copyright 2016 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/arc/notification/arc_custom_notification_view.h"
 
 #include "ash/wm/window_util.h"
 #include "base/auto_reset.h"
 #include "base/memory/ptr_util.h"
 #include "components/exo/notification_surface.h"
@@ skipping 182 matching lines @@
 
   void OnBlur() override {
     message_center::PaddedButton::OnBlur();
     owner_->UpdateControlButtonsVisiblity();
   }
 
  private:
   ArcCustomNotificationView* const owner_;
 };
 
-ArcCustomNotificationView::ArcCustomNotificationView(
-    ArcCustomNotificationItem* item)
+// static
+const char ArcCustomNotificationView::kViewClassName[] =
+    "ArcCustomNotificationView";
+
+ArcCustomNotificationView::ArcCustomNotificationView(ArcNotificationItem* item)
     : item_(item),
       notification_key_(item->notification_key()),
       event_forwarder_(new EventForwarder(this)) {
   SetFocusBehavior(FocusBehavior::ALWAYS);
 
   item_->IncrementWindowRefCount();
   item_->AddObserver(this);
 
-  ArcNotificationSurfaceManager::Get()->AddObserver(this);
-  exo::NotificationSurface* surface =
-      ArcNotificationSurfaceManager::Get()->GetSurface(notification_key_);
-  if (surface)
-    OnNotificationSurfaceAdded(surface);
+  if (ArcNotificationSurfaceManager::Get()) {
+    ArcNotificationSurfaceManager::Get()->AddObserver(this);
+    exo::NotificationSurface* surface =
+        ArcNotificationSurfaceManager::Get()->GetSurface(notification_key_);
+    if (surface)
+      OnNotificationSurfaceAdded(surface);
+  }
 
   // Create a layer as an anchor to insert surface copy during a slide.
   SetPaintToLayer();
   UpdatePreferredSize();
 }
 
 ArcCustomNotificationView::~ArcCustomNotificationView() {
   SetSurface(nullptr);
   if (item_) {
     item_->DecrementWindowRefCount();
     item_->RemoveObserver(this);
   }
 
   if (ArcNotificationSurfaceManager::Get())
     ArcNotificationSurfaceManager::Get()->RemoveObserver(this);
 }
 
+const char* ArcCustomNotificationView::GetClassName() const {
+  return kViewClassName;
+}
+
 std::unique_ptr<message_center::CustomNotificationContentViewDelegate>
 ArcCustomNotificationView::CreateContentViewDelegate() {
   return base::MakeUnique<ArcCustomNotificationView::ContentViewDelegate>(this);
 }
 
 void ArcCustomNotificationView::CreateFloatingControlButtons() {
   // Floating close button is a transient child of |surface_| and also part
   // of the hosting widget's focus chain. It could only be created when both
   // are present.
   if (!surface_ || !GetWidget())
@@ skipping 114 matching lines @@
 
   UpdatePreferredSize();
   SchedulePaint();
 }
 
 void ArcCustomNotificationView::AttachSurface() {
   if (!GetWidget())
     return;
 
   UpdatePreferredSize();
-  Attach(surface_->window());
+  surface_->AttachWindow(this);
 
   // The texture for this window can be placed at subpixel position
   // with fractional scale factor. Force to align it at the pixel
   // boundary here, and when layout is updated in Layout().
   ash::wm::SnapWindowToPixelBoundary(surface_->window());
 
   // Creates slide helper after this view is added to its parent.
   slide_helper_.reset(new SlideHelper(this));
 
   // Invokes Update() in case surface is attached during a slide.
@@ skipping 173 matching lines @@
 
 void ArcCustomNotificationView::OnNotificationSurfaceRemoved(
     exo::NotificationSurface* surface) {
   if (surface->notification_id() != notification_key_)
     return;
 
   SetSurface(nullptr);
 }
 
 }  // namespace arc