[fsp] Add support for providing thumbnails.

chrome/browser/chromeos/file_system_provider/operations/get_metadata.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_OPERATIONS_GET_METADATA_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_GET_METADATA_H_
 
 #include "base/files/file.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/file_system_provider/operations/operation.h"
@@ skipping 12 matching lines @@
 namespace chromeos {
 namespace file_system_provider {
 namespace operations {
 
 // Bridge between fileapi get metadata operation and providing extension's get
 // metadata request. Created per request.
 class GetMetadata : public Operation {
  public:
   GetMetadata(extensions::EventRouter* event_router,
               const ProvidedFileSystemInfo& file_system_info,
-              const base::FilePath& directory_path,
+              const base::FilePath& entry_path,
+              ProvidedFileSystemInterface::MetadataFieldMask fields,
               const ProvidedFileSystemInterface::GetMetadataCallback& callback);
   virtual ~GetMetadata();
 
   // Operation overrides.
   virtual bool Execute(int request_id) OVERRIDE;
   virtual void OnSuccess(int request_id,
                          scoped_ptr<RequestValue> result,
                          bool has_more) OVERRIDE;
   virtual void OnError(int request_id,
                        scoped_ptr<RequestValue> result,
                        base::File::Error error) OVERRIDE;
 
  private:
   base::FilePath entry_path_;
+  ProvidedFileSystemInterface::MetadataFieldMask fields_;
   const ProvidedFileSystemInterface::GetMetadataCallback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(GetMetadata);
 };
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_OPERATIONS_GET_METADATA_H_