Make LogoutButtonTray a regular View

ash/system/web_notification/web_notification_tray.cc

Index: ash/system/web_notification/web_notification_tray.cc
diff --git a/ash/system/web_notification/web_notification_tray.cc b/ash/system/web_notification/web_notification_tray.cc
index 20d9149476cec9bb4d9735fed36f519a069d6f65..e3bc136932ceea183ae2b488808f4db1a92912b5 100644
--- a/ash/system/web_notification/web_notification_tray.cc
+++ b/ash/system/web_notification/web_notification_tray.cc
@@ -18,6 +18,7 @@
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/system/tray/tray_bubble_wrapper.h"
 #include "ash/system/tray/tray_constants.h"
+#include "ash/system/tray/tray_container.h"
 #include "ash/system/tray/tray_utils.h"
 #include "ash/system/web_notification/ash_popup_alignment_delegate.h"
 #include "ash/wm_window.h"
@@ -164,7 +165,7 @@ class WebNotificationItem : public views::View, public gfx::AnimationDelegate {
     // the icons on the left are shifted with the animation.
     // Note that TrayItemView does the same thing.
     gfx::Size size = kTrayItemOuterSize;
-    if (IsHorizontalLayout()) {
+    if (tray_->shelf()->IsHorizontalAlignment()) {
       size.set_width(std::max(
           1, gfx::ToRoundedInt(size.width() * animation_->GetCurrentValue())));
     } else {
@@ -178,15 +179,11 @@ class WebNotificationItem : public views::View, public gfx::AnimationDelegate {
     return GetPreferredSize().height();
   }
 
-  bool IsHorizontalLayout() const {
-    return IsHorizontalAlignment(tray_->shelf_alignment());
-  }
-
  private:
   // gfx::AnimationDelegate:
   void AnimationProgressed(const gfx::Animation* animation) override {
     gfx::Transform transform;
-    if (IsHorizontalLayout()) {
+    if (tray_->shelf()->IsHorizontalAlignment()) {
       transform.Translate(0, animation->CurrentValueBetween(
                                  static_cast<double>(height()) / 2., 0.));
     } else {
@@ -273,7 +270,7 @@ class WebNotificationLabel : public WebNotificationItem {
 WebNotificationTray::WebNotificationTray(WmShelf* shelf,
                                          WmWindow* status_area_window,
                                          SystemTray* system_tray)
-    : TrayBackgroundView(shelf, true),
+    : TrayBackgroundView(shelf),
       status_area_window_(status_area_window),
       system_tray_(system_tray),
       show_message_center_on_unlock_(false),
@@ -333,7 +330,7 @@ bool WebNotificationTray::ShowMessageCenterInternal(bool show_settings) {
 
   // In the horizontal case, message center starts from the top of the shelf.
   // In the vertical case, it starts from the bottom of WebNotificationTray.
-  const int max_height = IsHorizontalAlignment(shelf_alignment())
+  const int max_height = shelf()->IsHorizontalAlignment()
                              ? shelf()->GetIdealBounds().y()
                              : GetBoundsInScreen().bottom();
   message_center_bubble->SetMaxHeight(max_height);
@@ -344,7 +341,7 @@ bool WebNotificationTray::ShowMessageCenterInternal(bool show_settings) {
   // For vertical shelf alignments, anchor to the WebNotificationTray, but for
   // horizontal (i.e. bottom) shelves, anchor to the system tray.
   TrayBackgroundView* anchor_tray = this;
-  if (IsHorizontalAlignment(shelf_alignment())) {
+  if (shelf()->IsHorizontalAlignment()) {
     anchor_tray = WmShelf::ForWindow(status_area_window_)
                       ->GetStatusAreaWidget()
                       ->system_tray();
@@ -420,10 +417,8 @@ void WebNotificationTray::UpdateAfterLoginStatusChange(
   OnMessageCenterTrayChanged();
 }
 
-void WebNotificationTray::SetShelfAlignment(ShelfAlignment alignment) {
-  if (alignment == shelf_alignment())
-    return;
-  TrayBackgroundView::SetShelfAlignment(alignment);
+void WebNotificationTray::UpdateAfterShelfAlignmentChange() {
+  TrayBackgroundView::UpdateAfterShelfAlignmentChange();
   // Destroy any existing bubble so that it will be rebuilt correctly.
   message_center_tray_->HideMessageCenterBubble();
   message_center_tray_->HidePopupBubble();