[fsp] Add FileStreamReader for the reading operation.

chrome/browser/chromeos/file_system_provider/fake_provided_file_system.h

Index: chrome/browser/chromeos/file_system_provider/fake_provided_file_system.h
diff --git a/chrome/browser/chromeos/file_system_provider/fake_provided_file_system.h b/chrome/browser/chromeos/file_system_provider/fake_provided_file_system.h
index 3401dc0f0963e8244fdb562a955630cd58bbd396..18feb7bb233c9e82c47336c8332ca1dfbf48b394 100644
--- a/chrome/browser/chromeos/file_system_provider/fake_provided_file_system.h
+++ b/chrome/browser/chromeos/file_system_provider/fake_provided_file_system.h
@@ -5,8 +5,9 @@
 #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"
 
@@ -23,6 +24,11 @@ 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 {
@@ -54,6 +60,7 @@ class FakeProvidedFileSystem : public ProvidedFileSystemInterface {
                         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.
@@ -62,10 +69,13 @@ class FakeProvidedFileSystem : public ProvidedFileSystemInterface {
       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);
 };