[FileManager] Do drive search incrementally

chrome/browser/chromeos/gdata/gdata_file_system_interface.h

 // Copyright (c) 2012 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_GDATA_GDATA_FILE_SYSTEM_INTERFACE_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_INTERFACE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 60 matching lines @@
 // If |error| is not PLATFORM_FILE_OK, |directory_info| is set to NULL.
 typedef base::Callback<void(GDataFileError error,
                             bool hide_hosted_documents,
                             scoped_ptr<GDataDirectoryProto> directory_proto)>
     ReadDirectoryCallback;
 
 // Used to get drive content search results.
 // If |error| is not PLATFORM_FILE_OK, |result_paths| is empty.
 typedef base::Callback<void(
     GDataFileError error,
+    const GURL& next_feed,
     scoped_ptr<std::vector<SearchResultInfo> > result_paths)> SearchCallback;
 
 // Used to open files from the file system. |file_path| is the path on the local
 // file system for the opened file.
 typedef base::Callback<void(GDataFileError error,
                             const FilePath& file_path)> OpenFileCallback;
 
 // Used to get available space for the account from GData.
 typedef base::Callback<void(GDataFileError error,
                             int64 bytes_total,
@@ skipping 234 matching lines @@
   //
   // Upon success, the metadata of files in the target directory is updated,
   // and the change is notified via Observer::OnDirectoryChanged(). Note that
   // this function ignores changes in directories in the target
   // directory. Changes in directories are handled via the delta feeds.
   //
   // Can be called from UI/IO thread.
   virtual void RequestDirectoryRefresh(const FilePath& file_path) = 0;
 
   // Does server side content search for |search_query|.
+  // If |next_feed| is set, this is the feed url that will be fetched.
   // Search results will be returned as a list of results' |SearchResultInfo|
   // structs, which contains file's path and is_directory flag.
   //
   // Can be called from UI/IO thread. |callback| is run on the calling thread.
   virtual void Search(const std::string& search_query,
+                      const GURL& next_feed,
                       const SearchCallback& callback) = 0;
 
   // Fetches the user's Account Metadata to find out current quota information
   // and returns it to the callback.
   virtual void GetAvailableSpace(const GetAvailableSpaceCallback& callback) = 0;
 
   // Adds a file entry from |entry| under |virtual_dir_path|, and modifies
   // the cache state.
   //
   // When uploading a new file, adds a new file entry, and store its content
   // from |file_content_path| into the cache.
   //
   // When uploading an existing file, replaces the file entry with a new one,
   // and clears the dirty bit in the cache.
   //
   // |callback| will be called on the UI thread upon completion of operation.
   virtual void AddUploadedFile(UploadMode upload_mode,
                                const FilePath& virtual_dir_path,
                                scoped_ptr<DocumentEntry> entry,
                                const FilePath& file_content_path,
                                GDataCache::FileOperationType cache_operation,
                                const base::Closure& callback) = 0;
 };
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_INTERFACE_H_