Add a tray notification UI for speech input recording in the extension API.

chrome/common/pref_names.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/common/pref_names.h"
 
 #include "base/basictypes.h"
 
 namespace prefs {
 
@@ skipping 610 matching lines @@
 const char kEnabledLabsExperiments[] = "browser.enabled_labs_experiments";
 
 // Boolean pref to define the default values for using auto spell correct.
 const char kEnableAutoSpellCorrect[] = "browser.enable_autospellcorrect";
 
 // Boolean pref to define the default setting for "block offensive words".
 // The old key value is kept to avoid unnecessary migration code.
 const char kSpeechInputFilterProfanities[] =
     "browser.speechinput_censor_results";
 
+// Boolean pref to determine if the tray notification balloon for speech input
+// extension API has been already shown once to the user.
+const char kSpeechInputTrayNotificationShown[] =
+    "browser.speechinput_tray_notification_shown";
+
 // Boolean controlling whether history saving is disabled.
 const char kSavingBrowserHistoryDisabled[] = "history.saving_disabled";
 
 // Boolean controlling whether printing is enabled.
 const char kPrintingEnabled[] = "printing.enabled";
 
 // Enable print preview once for supported platforms.
 #if defined(GOOGLE_CHROME_BUILD)
 const char kPrintingPrintPreviewEnabledOnce[] =
     "printing.print_preview_enabled_once";
@@ skipping 994 matching lines @@
 
 // String that represents the recovery component last downloaded version. This
 // takes the usual 'a.b.c.d' notation.
 const char kRecoveryComponentVersion[] = "recovery_component.version";
 
 // String that stores the component updater last known state. This is used for
 // troubleshooting.
 const char kComponentUpdaterState[] = "component_updater.state";
 
 }  // namespace prefs