[FileManager] Do drive search incrementally

chrome/browser/chromeos/extensions/file_browser_private_api.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_EXTENSIONS_FILE_BROWSER_PRIVATE_API_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_BROWSER_PRIVATE_API_H_
 
 #include <map>
 #include <string>
 #include <queue>
@@ skipping 630 matching lines @@
  protected:
   virtual ~SetGDataPreferencesFunction() {}
 
   virtual bool RunImpl() OVERRIDE;
 };
 
 class SearchDriveFunction : public AsyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME("fileBrowserPrivate.searchGData");
 
+  SearchDriveFunction();
+
  protected:
-  virtual ~SearchDriveFunction() {}
+  virtual ~SearchDriveFunction();
 
   virtual bool RunImpl() OVERRIDE;
 
  private:
   // Callback fo OpenFileSystem called from RunImpl.
   void OnFileSystemOpened(base::PlatformFileError result,
                           const std::string& file_system_name,
                           const GURL& file_system_url);
   // Callback for gdata::SearchAsync called after file system is opened.
   void OnSearch(gdata::GDataFileError error,
+                const GURL& next_feed,
                 scoped_ptr<std::vector<gdata::SearchResultInfo> > result_paths);
 
   // Query for which the search is being performed.
   std::string query_;
+  std::string next_feed_;
   // Information about remote file system we will need to create file entries
   // to represent search results.
   std::string file_system_name_;
   GURL file_system_url_;
 };
 
 class ClearDriveCacheFunction : public AsyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME("fileBrowserPrivate.clearDriveCache");
 
@@ skipping 21 matching lines @@
   DECLARE_EXTENSION_FUNCTION_NAME(
       "fileBrowserPrivate.requestDirectoryRefresh");
 
  protected:
   virtual ~RequestDirectoryRefreshFunction() {}
 
   virtual bool RunImpl() OVERRIDE;
 };
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_BROWSER_PRIVATE_API_H_