[FileManager] Do drive search incrementally

chrome/browser/chromeos/extensions/file_browser_private_api.h

Index: chrome/browser/chromeos/extensions/file_browser_private_api.h
diff --git a/chrome/browser/chromeos/extensions/file_browser_private_api.h b/chrome/browser/chromeos/extensions/file_browser_private_api.h
index bfc897249b23cb1d0aaec2104f0deeb2520f923f..6e58c8420579595804b97203e574ed53e8c148e0 100644
--- a/chrome/browser/chromeos/extensions/file_browser_private_api.h
+++ b/chrome/browser/chromeos/extensions/file_browser_private_api.h
@@ -648,8 +648,10 @@ class SearchDriveFunction : public AsyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION_NAME("fileBrowserPrivate.searchGData");
 
+  SearchDriveFunction();
+
  protected:
-  virtual ~SearchDriveFunction() {}
+  virtual ~SearchDriveFunction();
 
   virtual bool RunImpl() OVERRIDE;
 
@@ -660,10 +662,12 @@ class SearchDriveFunction : public AsyncExtensionFunction {
                           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_;