Enforce the 'requirements' field in manifests.

chrome/browser/extensions/updater/extension_updater.h

Index: chrome/browser/extensions/updater/extension_updater.h
diff --git a/chrome/browser/extensions/updater/extension_updater.h b/chrome/browser/extensions/updater/extension_updater.h
index fd86dcbc9520d20c8262733f120c8790c6e34fa4..62cedc8d5b270c4f7c9247254313b074515bf307 100644
--- a/chrome/browser/extensions/updater/extension_updater.h
+++ b/chrome/browser/extensions/updater/extension_updater.h
@@ -93,12 +93,14 @@ class ExtensionUpdater : public ExtensionDownloaderDelegate,
     FetchedCRXFile();
     FetchedCRXFile(const std::string& id,
                    const FilePath& path,
-                   const GURL& download_url);
+                   const GURL& download_url,
+                   const bool is_sync);
     ~FetchedCRXFile();
 
     std::string id;
     FilePath path;
     GURL download_url;
+    bool is_sync;
   };
 
   // Computes when to schedule the first update check.
@@ -130,7 +132,8 @@ class ExtensionUpdater : public ExtensionDownloaderDelegate,
                                            const FilePath& path,
                                            const GURL& download_url,
                                            const std::string& version,
-                                           const PingResult& ping) OVERRIDE;
+                                           const PingResult& ping,
+                                           const bool is_sync) OVERRIDE;
 
   virtual void OnBlacklistDownloadFinished(const std::string& data,
                                            const std::string& package_hash,