[fsp] Add support for providing thumbnails.

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 <map>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
+#include "base/memory/linked_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/task/cancelable_task_tracker.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"
 
 class Profile;
 
 namespace base {
 class Time;
 }  // namespace base
 
 namespace net {
 class IOBuffer;
 }  // namespace net
 
 namespace chromeos {
 namespace file_system_provider {
 
 class RequestManager;
 
 // Path of a sample fake file, which is added to the fake file system by
 // default.
 extern const char kFakeFilePath[];
 
 // Represents a file or a directory on a fake file system.
 struct FakeEntry {
-  FakeEntry() {}
+  FakeEntry();
+  FakeEntry(scoped_ptr<EntryMetadata> metadata, const std::string& contents);
+  ~FakeEntry();
 
-  FakeEntry(const EntryMetadata& metadata, const std::string& contents)
-      : metadata(metadata), contents(contents) {}
+  scoped_ptr<EntryMetadata> metadata;
+  std::string contents;
 
-  virtual ~FakeEntry() {}
-
-  EntryMetadata metadata;
-  std::string contents;
+ private:
+  DISALLOW_COPY_AND_ASSIGN(FakeEntry);
 };
 
 // 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();
 
   // Adds a fake entry to the fake file system.
   void AddEntry(const base::FilePath& entry_path,
                 bool is_directory,
                 const std::string& name,
                 int64 size,
                 base::Time modification_time,
                 std::string mime_type,
                 std::string contents);
 
   // Fetches a pointer to a fake entry registered in the fake file system. If
-  // found, then the result is written to |fake_entry| and true is returned.
-  // Otherwise, false is returned. |fake_entry| must not be NULL.
-  bool GetEntry(const base::FilePath& entry_path, FakeEntry* fake_entry) const;
+  // not found, then returns NULL. The returned pointes is owned by
+  // FakeProvidedFileSystem.
+  const FakeEntry* GetEntry(const base::FilePath& entry_path) const;
 
   // ProvidedFileSystemInterface overrides.
   virtual AbortCallback RequestUnmount(
       const storage::AsyncFileUtil::StatusCallback& callback) OVERRIDE;
   virtual AbortCallback GetMetadata(
       const base::FilePath& entry_path,
+      ProvidedFileSystemInterface::MetadataFieldMask fields,
       const ProvidedFileSystemInterface::GetMetadataCallback& callback)
       OVERRIDE;
   virtual AbortCallback ReadDirectory(
       const base::FilePath& directory_path,
       const storage::AsyncFileUtil::ReadDirectoryCallback& callback) OVERRIDE;
   virtual AbortCallback OpenFile(const base::FilePath& file_path,
                                  OpenFileMode mode,
                                  const OpenFileCallback& callback) OVERRIDE;
   virtual AbortCallback CloseFile(
       int file_handle,
@@ skipping 38 matching lines @@
   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(
       Profile* profile,
       const ProvidedFileSystemInfo& file_system_info);
 
  private:
-  typedef std::map<base::FilePath, FakeEntry> Entries;
+  typedef std::map<base::FilePath, linked_ptr<FakeEntry> > Entries;
   typedef std::map<int, base::FilePath> OpenedFilesMap;
 
   // Utility function for posting a task which can be aborted by calling the
   // returned callback.
   AbortCallback PostAbortableTask(const base::Closure& callback);
 
   // Aborts a request. |task_id| refers to a posted callback returning a
   // response for the operation, which will be cancelled, hence not called.
   void Abort(int task_id,
              const storage::AsyncFileUtil::StatusCallback& callback);
@@ skipping 11 matching lines @@
   base::CancelableTaskTracker tracker_;
 
   base::WeakPtrFactory<FakeProvidedFileSystem> 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_