Parse manifest file with app.service_worker.script.

extensions/common/manifest_handlers/background_info.h

Index: extensions/common/manifest_handlers/background_info.h
diff --git a/extensions/common/manifest_handlers/background_info.h b/extensions/common/manifest_handlers/background_info.h
index e9e360e696306160376a52b709ba8561c3bae2d7..947ee650ab2f85accb9068e21d14f4f619195a8d 100644
--- a/extensions/common/manifest_handlers/background_info.h
+++ b/extensions/common/manifest_handlers/background_info.h
@@ -23,10 +23,12 @@ class BackgroundInfo : public Extension::ManifestData {
   static GURL GetBackgroundURL(const Extension* extension);
   static const std::vector<std::string>& GetBackgroundScripts(
       const Extension* extension);
+  static const std::string& GetServiceWorkerScript(const Extension* extension);
   static bool HasBackgroundPage(const Extension* extension);
   static bool HasPersistentBackgroundPage(const Extension* extension);
   static bool HasLazyBackgroundPage(const Extension* extension);
   static bool HasGeneratedBackgroundPage(const Extension* extension);
+  static bool HasServiceWorker(const Extension* extension);
   static bool AllowJSAccess(const Extension* extension);
 
   bool has_background_page() const {
@@ -41,9 +43,14 @@ class BackgroundInfo : public Extension::ManifestData {
     return has_background_page() && !is_persistent_;
   }
 
+  bool has_service_worker() const { return !service_worker_script_.empty(); }
+
   bool Parse(const Extension* extension, base::string16* error);
 
  private:
+  bool LoadServiceWorkerScript(const Extension* extension,
+                               const std::string& key,
+                               base::string16* error);
   bool LoadBackgroundScripts(const Extension* extension,
                              const std::string& key,
                              base::string16* error);
@@ -67,6 +74,10 @@ class BackgroundInfo : public Extension::ManifestData {
   // load on-demand (when it needs to handle an event). Defaults to true.
   bool is_persistent_;
 
+  // Optional script to register as a service worker. This is mutually exclusive
+  // to the use of background_url_ or background_scripts_.
+  std::string service_worker_script_;
+
   // True if the background page can be scripted by pages of the app or
   // extension, in which case all such pages must run in the same process.
   // False if such pages are not permitted to script the background page,