app_list: Improve initial icon loading.

ui/app_list/contents_view.cc

 // 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.
 
 #include "ui/app_list/contents_view.h"
 
 #include <algorithm>
 
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/app_list_view.h"
 #include "ui/app_list/apps_grid_view.h"
 #include "ui/app_list/pagination_model.h"
 #include "ui/app_list/search_result_list_view.h"
 #include "ui/base/events/event.h"
 #include "ui/views/animation/bounds_animator.h"
 #include "ui/views/view_model.h"
 #include "ui/views/view_model_utils.h"
 
 namespace app_list {
 
 namespace {
 
 const int kPreferredIconDimension = 48;
-const int kPreferredCols = 4;
-const int kPreferredRows = 4;
 
 // Indexes of interesting views in ViewModel of ContentsView.
 const int kIndexAppsGrid = 0;
 const int kIndexSearchResults = 1;
 
 const int kMinMouseWheelToSwitchPage = 20;
 const int kMinScrollToSwitchPage = 20;
 const int kMinHorizVelocityToSwitchPage = 800;
 
 const double kFinishTransitionThreshold = 0.33;
@@ skipping 193 matching lines @@
   }
 
   if (!pagination_model_->has_transition()) {
     pagination_model_->SelectPageRelative(event->x_offset() > 0 ? -1 : 1,
                                           true);
   }
   return ui::ER_HANDLED;
 }
 
 }  // namespace app_list