Re-factor Ash Message Center code part 2/4

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 e5e473882a33f16f7cfc04abb3d29b1a5ee383b6..1f225cf000f25824cfa10049d9f36755ff266667 100644
--- a/ash/system/web_notification/web_notification_tray.cc
+++ b/ash/system/web_notification/web_notification_tray.cc
@@ -350,14 +350,24 @@ void WebNotificationTray::UpdateTrayAndBubble() {
   UpdateTray();
 }
 
-void WebNotificationTray::HideBubble(WebNotificationBubble* bubble) {
-  if (bubble == message_center_bubble()) {
+void WebNotificationTray::HideBubbleWithView(
+    const TrayBubbleView* bubble_view) {
+  if (message_center_bubble() &&
+      bubble_view == message_center_bubble()->bubble_view()) {
     HideMessageCenterBubble();
-  } else if (bubble == popup_bubble()) {
+  } else if (popup_bubble() && bubble_view == popup_bubble()->bubble_view()) {
     HidePopupBubble();
   }
 }
 
+bool WebNotificationTray::ClickedOutsideBubble() {
+  // Only hide the message center.
+  if (!message_center_bubble())
+    return false;
+  HideMessageCenterBubble();
+  return true;
+}
+
 // Methods for testing
 
 size_t WebNotificationTray::GetNotificationCountForTest() const {