Revert of Add Keys() function to ServiceWorkerCache.

content/browser/service_worker/service_worker_cache.h

Index: content/browser/service_worker/service_worker_cache.h
diff --git a/content/browser/service_worker/service_worker_cache.h b/content/browser/service_worker/service_worker_cache.h
index ddc13b4871d8f93e2ea306e7d4a8e3aeaaf868ce..42393a29e1ea10cfff90b9b8babb2f788bd89d3e 100644
--- a/content/browser/service_worker/service_worker_cache.h
+++ b/content/browser/service_worker/service_worker_cache.h
@@ -25,7 +25,6 @@
 
 namespace content {
 class ChromeBlobStorageContext;
-class ServiceWorkerRequestResponseHeaders;
 
 // TODO(jkarlin): Unload cache backend from memory once the cache object is no
 // longer referenced in javascript.
@@ -47,10 +46,6 @@
                               scoped_ptr<ServiceWorkerResponse>,
                               scoped_ptr<storage::BlobDataHandle>)>
       ResponseCallback;
-  typedef std::vector<ServiceWorkerFetchRequest> Requests;
-  typedef base::Callback<void(ErrorType, scoped_ptr<Requests>)>
-      RequestsCallback;
-
   static scoped_ptr<ServiceWorkerCache> CreateMemoryCache(
       net::URLRequestContext* request_context,
       base::WeakPtr<storage::BlobStorageContext> blob_context);
@@ -85,11 +80,6 @@
   void Delete(ServiceWorkerFetchRequest* request,
               const ErrorCallback& callback);
 
-  // TODO(jkarlin): Have keys take an optional ServiceWorkerFetchRequest.
-  // Returns ErrorTypeOK and a vector of requests if there are no errors. The
-  // callback will always be called.
-  void Keys(const RequestsCallback& callback);
-
   // Call to determine if CreateBackend must be called.
   bool HasCreatedBackend() const;
 
@@ -100,22 +90,9 @@
   base::WeakPtr<ServiceWorkerCache> AsWeakPtr();
 
  private:
-  struct KeysContext;
-  typedef std::vector<disk_cache::Entry*> Entries;
-
   ServiceWorkerCache(const base::FilePath& path,
                      net::URLRequestContext* request_context,
                      base::WeakPtr<storage::BlobStorageContext> blob_context);
-
-  // Static callbacks for the Keys function.
-  static void KeysDidOpenNextEntry(scoped_ptr<KeysContext> keys_context,
-                                   int rv);
-  static void KeysProcessNextEntry(scoped_ptr<KeysContext> keys_context,
-                                   const Entries::iterator& iter);
-  static void KeysDidReadHeaders(
-      scoped_ptr<KeysContext> keys_context,
-      const Entries::iterator& iter,
-      scoped_ptr<ServiceWorkerRequestResponseHeaders> headers);
 
   scoped_ptr<disk_cache::Backend> backend_;
   base::FilePath path_;