Add platform_app flag to manifest.

chrome/common/extensions/extension_constants.h

 // 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.
 
 #ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_
 #pragma once
 
 #include <string>
 
@@ skipping 59 matching lines @@
   extern const char* kPageActionDefaultIcon;
   extern const char* kPageActionDefaultPopup;
   extern const char* kPageActionDefaultTitle;
   extern const char* kPageActionIcons;
   extern const char* kPageActionId;
   extern const char* kPageActionPopup;
   extern const char* kPageActionPopupHeight;
   extern const char* kPageActionPopupPath;
   extern const char* kPageActions;
   extern const char* kPermissions;
+  extern const char* kPlatformApp;
   extern const char* kPlugins;
   extern const char* kPluginsPath;
   extern const char* kPluginsPublic;
   extern const char* kPublicKey;
   extern const char* kRequirements;
   extern const char* kRunAt;
   extern const char* kShiftKey;
   extern const char* kShortcutKey;
   extern const char* kSidebar;
   extern const char* kSidebarDefaultIcon;
@@ skipping 97 matching lines @@
   extern const char* kInvalidIntentPath;
   extern const char* kInvalidIntents;
   extern const char* kInvalidIntentType;
   extern const char* kInvalidIntentTitle;
   extern const char* kInvalidIsolation;
   extern const char* kInvalidIsolationValue;
   extern const char* kInvalidJs;
   extern const char* kInvalidJsList;
   extern const char* kInvalidKey;
   extern const char* kInvalidLaunchContainer;
+  extern const char* kInvalidLaunchContainerForPlatform;
   extern const char* kInvalidLaunchHeight;
   extern const char* kInvalidLaunchHeightContainer;
   extern const char* kInvalidLaunchLocalPath;
   extern const char* kInvalidLaunchWebURL;
   extern const char* kInvalidLaunchWidth;
   extern const char* kInvalidLaunchWidthContainer;
   extern const char* kInvalidManifest;
   extern const char* kInvalidMatch;
   extern const char* kInvalidMatchCount;
   extern const char* kInvalidMatches;
@@ skipping 259 matching lines @@
     SYNC_PROMO_CONFIRMED_AFTER_SIGN_IN,
     SYNC_PROMO_CLOSED_TAB,
     SYNC_PROMO_CLOSED_WINDOW,
     SYNC_PROMO_BUCKET_BOUNDARY,
     SYNC_PROMO_FIRST_VALID_JS_ACTION = SYNC_PROMO_LEARN_MORE_CLICKED,
     SYNC_PROMO_LAST_VALID_JS_ACTION = SYNC_PROMO_CONFIRMED_AFTER_SIGN_IN,
   };
 } // extension_misc
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_CONSTANTS_H_