Make Extension::ShouldDisplayInLauncher driven by manifest property.

chrome/common/extensions/extension.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_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_H_
 
 #include <algorithm>
 #include <iosfwd>
 #include <map>
@@ skipping 1125 matching lines @@
   // users can override the way each app launches.  See
   // ExtensionPrefs::GetLaunchContainer(), which looks at a per-app pref
   // to decide what container an app will launch in.
   extension_misc::LaunchContainer launch_container_;
 
   // The default size of the container when launching. Only respected for
   // containers like panels and windows.
   int launch_width_;
   int launch_height_;
 
+  // Should this app be shown in a launcher.
+  bool display_in_launcher_;
+
   // The Omnibox keyword for this extension, or empty if there is none.
   std::string omnibox_keyword_;
 
   // List of text-to-speech voices that this extension provides, if any.
   std::vector<TtsVoice> tts_voices_;
 
   // The OAuth2 client id and scopes, if specified by the extension.
   OAuth2Info oauth2_info_;
 
   // List of intent services that this extension provides, if any.
@@ skipping 74 matching lines @@
 
   UpdatedExtensionPermissionsInfo(
       const Extension* extension,
       const PermissionSet* permissions,
       Reason reason);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_H_