Parse manifest file with app.service_worker.script.

extensions/common/manifest_constants.h

Index: extensions/common/manifest_constants.h
diff --git a/extensions/common/manifest_constants.h b/extensions/common/manifest_constants.h
index a9c39fed2a6e170df08c54d7059c2b010992ab98..a20eb58a28f66bc5896ff63a30cc5eaa524756e6 100644
--- a/extensions/common/manifest_constants.h
+++ b/extensions/common/manifest_constants.h
@@ -115,6 +115,8 @@ extern const char kPlatformAppBackground[];
 extern const char kPlatformAppBackgroundPage[];
 extern const char kPlatformAppBackgroundScripts[];
 extern const char kPlatformAppContentSecurityPolicy[];
+extern const char kPlatformAppServiceWorker[];
+extern const char kPlatformAppServiceWorkerScript[];
 extern const char kPlugins[];
 extern const char kPluginsPath[];
 extern const char kPluginsPublic[];
@@ -392,6 +394,7 @@ extern const char kInvalidSandboxedPage[];
 extern const char kInvalidSandboxedPagesCSP[];
 extern const char kInvalidScriptBadge[];
 extern const char kInvalidSearchEngineURL[];
+extern const char kInvalidServiceWorkerScript[];
 extern const char kInvalidEmptySettingsOverrides[];
 extern const char kInvalidShortName[];
 extern const char kInvalidSignature[];