Adds a skeleton component app for Always-On Hotwording opt-in flow.

chrome/common/extensions/extension_constants.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 98 matching lines @@
 
 // The extension id of the HTerm dev app for ChromeOS.
 extern const char kHTermDevAppId[];
 
 // The extension id of the Identity API UI application.
 extern const char kIdentityApiUiAppId[];
 
 // The extension id of the Crosh component app for ChromeOS.
 extern const char kCroshBuiltinAppId[];
 
+// The extension id of the hotword audio verification dialogue app.
+extern const char kHotwordAudioVerificationAppId[];
+
 // The extension id of the hotword voice search trigger extension.
 extern const char kHotwordExtensionId[];
 
 // The extension id of the PDF extension.
 extern const char kPdfExtensionId[];
 
 // The extension id of the Office Viewer component extension.
 extern const char kQuickOfficeComponentExtensionId[];
 
 // The extension id of the Office Viewer extension on the internal webstore.
@@ skipping 196 matching lines @@
   LAUNCH_CONTAINER_PANEL,
   LAUNCH_CONTAINER_TAB,
   // For platform apps, which don't actually have a container (they just get a
   // "onLaunched" event).
   LAUNCH_CONTAINER_NONE
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_