[fsp] Add FileStreamReader for the reading operation.

chrome/browser/chromeos/file_system_provider/fake_provided_file_system.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_FAKE_PROVIDED_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_FAKE_PROVIDED_FILE_SYSTEM_H_
 
-#include <set>
+#include <map>
 
+#include "base/memory/weak_ptr.h"
 #include "chrome/browser/chromeos/file_system_provider/provided_file_system_info.h"
 #include "chrome/browser/chromeos/file_system_provider/provided_file_system_interface.h"
 
 namespace net {
 class IOBuffer;
 }  // namespace net
 
 namespace extensions {
 class EventRouter;
 }  // namespace extensions
 
 namespace chromeos {
 namespace file_system_provider {
 
 class RequestManager;
 
+extern const char kFakeFileName[];
+extern const char kFakeFilePath[];
+extern const char kFakeFileText[];
+extern const size_t kFakeFileSize;
+
 // Fake provided file system implementation. Does not communicate with target
 // extensions. Used for unit tests.
 class FakeProvidedFileSystem : public ProvidedFileSystemInterface {
  public:
   explicit FakeProvidedFileSystem(
       const ProvidedFileSystemInfo& file_system_info);
   virtual ~FakeProvidedFileSystem();
 
   // ProvidedFileSystemInterface overrides.
   virtual void RequestUnmount(
@@ skipping 11 matching lines @@
   virtual void CloseFile(
       int file_handle,
       const fileapi::AsyncFileUtil::StatusCallback& callback) OVERRIDE;
   virtual void ReadFile(int file_handle,
                         net::IOBuffer* buffer,
                         int64 offset,
                         int length,
                         const ReadChunkReceivedCallback& callback) OVERRIDE;
   virtual const ProvidedFileSystemInfo& GetFileSystemInfo() const OVERRIDE;
   virtual RequestManager* GetRequestManager() OVERRIDE;
+  virtual base::WeakPtr<ProvidedFileSystemInterface> GetWeakPtr() OVERRIDE;
 
   // Factory callback, to be used in Service::SetFileSystemFactory(). The
   // |event_router| argument can be NULL.
   static ProvidedFileSystemInterface* Create(
       extensions::EventRouter* event_router,
       const ProvidedFileSystemInfo& file_system_info);
 
  private:
+  typedef std::map<int, base::FilePath> OpenedFilesMap;
+
   ProvidedFileSystemInfo file_system_info_;
-  std::set<int> opened_files_;
+  OpenedFilesMap opened_files_;
   int last_file_handle_;
 
+  base::WeakPtrFactory<ProvidedFileSystemInterface> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(FakeProvidedFileSystem);
 };
 
 }  // namespace file_system_provider
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_FAKE_PROVIDED_FILE_SYSTEM_H_