[FileManager] Do drive search incrementally

chrome/browser/chromeos/gdata/gdata_file_system.h

Index: chrome/browser/chromeos/gdata/gdata_file_system.h
diff --git a/chrome/browser/chromeos/gdata/gdata_file_system.h b/chrome/browser/chromeos/gdata/gdata_file_system.h
index 5be09c7895ec1772779cf7355456a5e0a6cf5753..df432ddd1e05d4ae96b0971447920cd9513b5f29 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system.h
+++ b/chrome/browser/chromeos/gdata/gdata_file_system.h
@@ -62,6 +62,7 @@ class GDataFileSystem : public GDataFileSystemInterface,
       const std::string& resource_id,
       const GetFileInfoWithFilePathCallback& callback) OVERRIDE;
   virtual void Search(const std::string& search_query,
+                      const GURL& next_feed,
                       const SearchCallback& callback) OVERRIDE;
   virtual void TransferFileFromRemoteToLocal(
       const FilePath& remote_src_file_path,
@@ -591,12 +592,14 @@ class GDataFileSystem : public GDataFileSystemInterface,
   // after we retrieve first feed chunk.
   // If invoked as a part of content search, query will be set in
   // |search_query|.
+  // If |feed_to_load| is set, this is feed url that will be used to load feed.
   void LoadFeedFromServer(ContentOrigin initial_origin,
                           int start_changestamp,
                           int root_feed_changestamp,
                           bool should_fetch_multiple_feeds,
                           const FilePath& search_file_path,
                           const std::string& search_query,
+                          const GURL& feed_to_load,
                           const std::string& directory_resource_id,
                           const FindEntryCallback& entry_found_callback,
                           const LoadDocumentFeedCallback& load_feed_callback);
@@ -754,6 +757,7 @@ class GDataFileSystem : public GDataFileSystemInterface,
   // The following functions are used to forward calls to asynchronous public
   // member functions to UI thread.
   void SearchAsyncOnUIThread(const std::string& search_query,
+                             const GURL& next_feed,
                              const SearchCallback& callback);
   void OpenFileOnUIThread(const FilePath& file_path,
                           const OpenFileCallback& callback);