Added 'launcher_page' field to extension manifest.json format.

extensions/common/manifest_constants.cc

 // Copyright 2013 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 "extensions/common/manifest_constants.h"
 
 namespace extensions {
 
 namespace manifest_keys {
 
@@ skipping 50 matching lines @@
 const char kIsolation[] = "app.isolation";
 const char kJs[] = "js";
 const char kKey[] = "key";
 const char kKeycode[] = "keyCode";
 const char kKioskEnabled[] = "kiosk_enabled";
 const char kKioskOnly[] = "kiosk_only";
 const char kKioskMode[] = "kiosk_mode";
 const char kLanguage[] = "language";
 const char kLaunch[] = "app.launch";
 const char kLaunchContainer[] = "app.launch.container";
+const char kLauncherPage[] = "launcher_page";
+const char kLauncherPagePage[] = "launcher_page.page";
 const char kLaunchHeight[] = "app.launch.height";
 const char kLaunchLocalPath[] = "app.launch.local_path";
 const char kLaunchWebURL[] = "app.launch.web_url";
 const char kLaunchWidth[] = "app.launch.width";
 const char kLayouts[] = "layouts";
 const char kManifestVersion[] = "manifest_version";
 const char kMatchAboutBlank[] = "match_about_blank";
 const char kMatches[] = "matches";
 const char kMinimumChromeVersion[] = "minimum_chrome_version";
 const char kMinimumVersion[] = "minimum_version";
@@ skipping 642 matching lines @@
 const char kWebRequestConflictsWithLazyBackground[] =
     "The 'webRequest' API cannot be used with event pages.";
 #if defined(OS_CHROMEOS)
 const char kIllegalPlugins[] =
     "Extensions cannot install plugins on Chrome OS";
 #endif
 
 }  // namespace manifest_errors
 
 }  // namespace extensions