Don't show caps lock notification bubble on lock screen.

chrome/browser/chromeos/status/caps_lock_menu_button.cc

 // Copyright (c) 2011 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 "chrome/browser/chromeos/status/caps_lock_menu_button.h"
 
 #include <string>
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/chromeos/input_method/xkeyboard.h"
+#include "chrome/browser/chromeos/login/screen_locker.h"
 #include "chrome/browser/chromeos/status/status_area_bubble.h"
 #include "chrome/browser/chromeos/system/runtime_environment.h"
 #include "chrome/browser/chromeos/view_ids.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
 #include "grit/generated_resources.h"
 #include "grit/theme_resources.h"
 #include "ui/base/l10n/l10n_util.h"
@@ skipping 175 matching lines @@
   return bubble_controller_.get() && bubble_controller_->IsBubbleShown();
 }
 
 void CapsLockMenuButton::MaybeShowBubble() {
   if (IsBubbleShown() ||
       // We've already shown the bubble |kMaxBubbleCount| times.
       !should_show_bubble_ ||
       // Don't show the bubble when Caps Lock key is available.
       HasCapsLock() ||
       // Don't show it when the status area is hidden.
-      (parent() && !parent()->visible()))
+      (parent() && !parent()->visible()) ||
+      // Don't show the bubble when screen is locked as this results in two
+      // visible caps lock bubbles (crbug.com/105280). The greater problem of
+      // displaying bubbles from all caps lock menu buttons regardless of
+      // visibility is described in crbug.com/106776.
+      ScreenLocker::default_screen_locker())
     return;
 
   ++bubble_count_;
   if (bubble_count_ > kMaxBubbleCount) {
     should_show_bubble_ = false;
   } else {
     CreateAndShowBubble();
   }
 }
 
@@ skipping 14 matching lines @@
 }
 
 bool CapsLockMenuButton::HasCapsLock() const {
   return (prefs_ &&
           (remap_search_key_to_.GetValue() == input_method::kCapsLockKey)) ||
       // A keyboard for Linux usually has Caps Lock.
       !system::runtime_environment::IsRunningOnChromeOS();
 }
 
 }  // namespace chromeos