Add Apps.AppListSearchResultDistanceFromOrigin UMA stat.

ui/app_list/views/search_result_list_view.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 UI_APP_LIST_VIEWS_SEARCH_RESULT_LIST_VIEW_H_
 #define UI_APP_LIST_VIEWS_SEARCH_RESULT_LIST_VIEW_H_
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "ui/app_list/views/search_result_container_view.h"
@@ skipping 37 matching lines @@
   // Overridden from views::View:
   bool OnKeyPressed(const ui::KeyEvent& event) override;
   gfx::Size GetPreferredSize() const override;
 
   // Overridden from ui::ListModelObserver:
   void ListItemsRemoved(size_t start, size_t count) override;
 
   // Overridden from SearchResultContainerView:
   void OnContainerSelected(bool from_bottom,
                            bool directional_movement) override;
+  void NotifyFirstResultYIndex(int y_index) override;
+  int GetYSize() override;
 
  private:
   friend class test::SearchResultListViewTest;
 
   // Overridden from SearchResultContainerView:
   int Update() override;
   void UpdateSelectedIndex(int old_selected, int new_selected) override;
 
   // Updates the auto launch states.
   void SetAutoLaunchTimeout(const base::TimeDelta& timeout);
@@ skipping 20 matching lines @@
   views::View* results_container_;
   views::View* auto_launch_indicator_;
   scoped_ptr<gfx::LinearAnimation> auto_launch_animation_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchResultListView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_SEARCH_RESULT_LIST_VIEW_H_