[fsp] Add support for aborting running operations.

chrome/browser/chromeos/file_system_provider/provided_file_system.h

Index: chrome/browser/chromeos/file_system_provider/provided_file_system.h
diff --git a/chrome/browser/chromeos/file_system_provider/provided_file_system.h b/chrome/browser/chromeos/file_system_provider/provided_file_system.h
index 95fc33d41e7bef5bcc25c04a0dec43e226cd72eb..b2fc735000e6e2a531695332f4d9f27aa0302ae8 100644
--- a/chrome/browser/chromeos/file_system_provider/provided_file_system.h
+++ b/chrome/browser/chromeos/file_system_provider/provided_file_system.h
@@ -39,49 +39,51 @@ class ProvidedFileSystem : public ProvidedFileSystemInterface {
   virtual ~ProvidedFileSystem();
 
   // ProvidedFileSystemInterface overrides.
-  virtual void RequestUnmount(
+  virtual AbortCallback RequestUnmount(
       const fileapi::AsyncFileUtil::StatusCallback& callback) OVERRIDE;
-  virtual void GetMetadata(const base::FilePath& entry_path,
-                           const GetMetadataCallback& callback) OVERRIDE;
-  virtual void ReadDirectory(
+  virtual AbortCallback GetMetadata(
+      const base::FilePath& entry_path,
+      const GetMetadataCallback& callback) OVERRIDE;
+  virtual AbortCallback ReadDirectory(
       const base::FilePath& directory_path,
       const fileapi::AsyncFileUtil::ReadDirectoryCallback& callback) OVERRIDE;
-  virtual void OpenFile(const base::FilePath& file_path,
-                        OpenFileMode mode,
-                        const OpenFileCallback& callback) OVERRIDE;
-  virtual void CloseFile(
+  virtual AbortCallback OpenFile(const base::FilePath& file_path,
+                                 OpenFileMode mode,
+                                 const OpenFileCallback& callback) OVERRIDE;
+  virtual AbortCallback 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 void CreateDirectory(
+  virtual AbortCallback ReadFile(
+      int file_handle,
+      net::IOBuffer* buffer,
+      int64 offset,
+      int length,
+      const ReadChunkReceivedCallback& callback) OVERRIDE;
+  virtual AbortCallback CreateDirectory(
       const base::FilePath& directory_path,
       bool exclusive,
       bool recursive,
       const fileapi::AsyncFileUtil::StatusCallback& callback) OVERRIDE;
-  virtual void DeleteEntry(
+  virtual AbortCallback DeleteEntry(
       const base::FilePath& entry_path,
       bool recursive,
       const fileapi::AsyncFileUtil::StatusCallback& callback) OVERRIDE;
-  virtual void CreateFile(
+  virtual AbortCallback CreateFile(
       const base::FilePath& file_path,
       const fileapi::AsyncFileUtil::StatusCallback& callback) OVERRIDE;
-  virtual void CopyEntry(
+  virtual AbortCallback CopyEntry(
       const base::FilePath& source_path,
       const base::FilePath& target_path,
       const fileapi::AsyncFileUtil::StatusCallback& callback) OVERRIDE;
-  virtual void MoveEntry(
+  virtual AbortCallback MoveEntry(
       const base::FilePath& source_path,
       const base::FilePath& target_path,
       const fileapi::AsyncFileUtil::StatusCallback& callback) OVERRIDE;
-  virtual void Truncate(
+  virtual AbortCallback Truncate(
       const base::FilePath& file_path,
       int64 length,
       const fileapi::AsyncFileUtil::StatusCallback& callback) OVERRIDE;
-  virtual void WriteFile(
+  virtual AbortCallback WriteFile(
       int file_handle,
       net::IOBuffer* buffer,
       int64 offset,
@@ -92,13 +94,19 @@ class ProvidedFileSystem : public ProvidedFileSystemInterface {
   virtual base::WeakPtr<ProvidedFileSystemInterface> GetWeakPtr() OVERRIDE;
 
  private:
+  // Aborts an operation executed with a request id equal to
+  // |operation_request_id|. The request is removed immediately on the C++ side
+  // despite being handled by the providing extension or not.
+  void Abort(int operation_request_id,
+             const fileapi::AsyncFileUtil::StatusCallback& callback);
+
   Profile* profile_;                       // Not owned.
   extensions::EventRouter* event_router_;  // Not owned. May be NULL.
   ProvidedFileSystemInfo file_system_info_;
   scoped_ptr<NotificationManagerInterface> notification_manager_;
   RequestManager request_manager_;
 
-  base::WeakPtrFactory<ProvidedFileSystemInterface> weak_ptr_factory_;
+  base::WeakPtrFactory<ProvidedFileSystem> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(ProvidedFileSystem);
 };