[fsp] Introduce chrome://fsp-internals for logging and debugging.

chrome/browser/chromeos/file_system_provider/request_manager.h

 // Copyright 2014 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_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_REQUEST_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_REQUEST_MANAGER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 49 matching lines @@
                       bool has_next);
 
   // Handles error response for the |request_id|. If handling the error fails,
   // returns false. Always disposes the request.
   bool RejectRequest(int request_id, base::File::Error error);
 
   // Sets a custom timeout for tests. The new timeout value will be applied to
   // new requests
   void SetTimeoutForTests(const base::TimeDelta& timeout);
 
+  // Gets number of active requests for logging purposes.
+  // TODO(mtomasz): Introduce a logger class to gather more information
+  size_t GetActiveRequestsForLogging() const;
+
  private:
   struct Request {
     Request();
     ~Request();
 
     // Timer for discarding the request during a timeout.
     base::OneShotTimer<RequestManager> timeout_timer;
 
     // Handler tied to this request.
     scoped_ptr<HandlerInterface> handler;
@@ skipping 12 matching lines @@
   base::TimeDelta timeout_;
   base::WeakPtrFactory<RequestManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RequestManager);
 };
 
 }  // namespace file_system_provider
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_REQUEST_MANAGER_H_