Do not activate system tray bubble by default

ash/common/system/chromeos/settings/tray_settings.cc

Index: ash/common/system/chromeos/settings/tray_settings.cc
diff --git a/ash/common/system/chromeos/settings/tray_settings.cc b/ash/common/system/chromeos/settings/tray_settings.cc
index 1c495b3eee8011b620e76cf00a526e2a84fb9169..2e4dd0a91ad7898aaa5e93c1e173faefa9dbd6cc 100644
--- a/ash/common/system/chromeos/settings/tray_settings.cc
+++ b/ash/common/system/chromeos/settings/tray_settings.cc
@@ -34,8 +34,11 @@ namespace tray {
 class SettingsDefaultView : public ActionableView,
                             public PowerStatus::Observer {
  public:
-  explicit SettingsDefaultView(LoginStatus status)
-      : login_status_(status), label_(NULL), power_status_view_(NULL) {
+  explicit SettingsDefaultView(SystemTrayItem* owner, LoginStatus status)

[James Cook, 2016/09/22 21:17:16]

nit: no explicit

[oshima, 2016/09/23 09:37:19]

Done.

+      : ActionableView(owner),
+        login_status_(status),
+        label_(NULL),

[James Cook, 2016/09/22 21:17:16]

nit: nullptr if you're touching the line

[oshima, 2016/09/23 09:37:19]

Done.

+        power_status_view_(NULL) {
     PowerStatus::Get()->AddObserver(this);
     SetLayoutManager(new views::BoxLayout(views::BoxLayout::kHorizontal,
                                           ash::kTrayPopupPaddingHorizontal, 0,
@@ -86,6 +89,7 @@ class SettingsDefaultView : public ActionableView,
     }
 
     WmShell::Get()->system_tray_delegate()->ShowSettings();
+    CloseSystemBubble();
     return true;
   }
 
@@ -149,7 +153,7 @@ views::View* TraySettings::CreateDefaultView(LoginStatus status) {
   if (!WmShell::Get()->system_tray_delegate()->ShouldShowSettings())
     return NULL;
   CHECK(default_view_ == NULL);
-  default_view_ = new tray::SettingsDefaultView(status);
+  default_view_ = new tray::SettingsDefaultView(this, status);
   return default_view_;
 }