Add Apps.AppListSearchResultDistanceFromOrigin UMA stat.

ui/app_list/views/start_page_view.cc

 // Copyright 2014 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.
 
 #include "ui/app_list/views/start_page_view.h"
 
 #include <string>
 
 #include "base/i18n/rtl.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 108 matching lines @@
     return search_result_tile_views_;
   }
 
   AllAppsTileItemView* all_apps_button() { return all_apps_button_; }
 
   // Overridden from SearchResultContainerView:
   int Update() override;
   void UpdateSelectedIndex(int old_selected, int new_selected) override;
   void OnContainerSelected(bool from_bottom,
                            bool directional_movement) override;
+  void NotifyFirstResultYIndex(int y_index) override;
+  int GetYSize() override;
 
  private:
   ContentsView* contents_view_;
 
   std::vector<SearchResultTileItemView*> search_result_tile_views_;
   AllAppsTileItemView* all_apps_button_;
 
   DISALLOW_COPY_AND_ASSIGN(StartPageTilesContainer);
 };
 
@@ skipping 72 matching lines @@
   if (old_selected >= 0)
     GetTileItemView(old_selected)->SetSelected(false);
 
   if (new_selected >= 0)
     GetTileItemView(new_selected)->SetSelected(true);
 }
 
 void StartPageView::StartPageTilesContainer::OnContainerSelected(
     bool /*from_bottom*/,
     bool /*directional_movement*/) {
+  NOTREACHED();
+}
+
+void StartPageView::StartPageTilesContainer::NotifyFirstResultYIndex(
+    int /*y_index*/) {
+  NOTREACHED();
+}
+
+int StartPageView::StartPageTilesContainer::GetYSize() {
+  NOTREACHED();
+  return 0;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // StartPageView implementation:
 StartPageView::StartPageView(AppListMainView* app_list_main_view,
                              AppListViewDelegate* view_delegate)
     : app_list_main_view_(app_list_main_view),
       view_delegate_(view_delegate),
       search_box_spacer_view_(new SearchBoxSpacerView(
           app_list_main_view->search_box_view()->GetPreferredSize())),
@@ skipping 249 matching lines @@
   // is enabled).
   if (event->type() == ui::ET_SCROLL && event->y_offset() < 0)
     MaybeOpenCustomLauncherPage();
 }
 
 TileItemView* StartPageView::GetTileItemView(size_t index) {
   return tiles_container_->GetTileItemView(index);
 }
 
 }  // namespace app_list