[Merge to M53][Chrome OS] Change layout of the launcher.

chrome/browser/ui/app_list/search/app_result.cc

 // Copyright 2016 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 "chrome/browser/ui/app_list/search/app_result.h"
 
 #include "base/time/time.h"
 #include "ui/app_list/app_list_switches.h"
 
 namespace app_list {
 
 AppResult::AppResult(Profile* profile,
                      const std::string& app_id,
                      AppListControllerDelegate* controller,
                      bool is_recommendation)
     : profile_(profile),
       app_id_(app_id),
       controller_(controller) {
   if (app_list::switches::IsExperimentalAppListEnabled())
     set_display_type(is_recommendation ? DISPLAY_RECOMMENDATION : DISPLAY_TILE);
 }
 
 AppResult::~AppResult() {
 }
 
-void AppResult::UpdateFromLastLaunched(const base::Time& current_time,
-                                       const base::Time& last_launched) {
-  base::TimeDelta delta = current_time - last_launched;
-  // |current_time| can be before |last_launched| in weird cases such as users
+void AppResult::UpdateFromLastLaunchedOrInstalledTime(
+    const base::Time& current_time,
+    const base::Time& old_time) {
+  // |current_time| can be before |old_time| in weird cases such as users
   // playing with their clocks. Handle this gracefully.
-  if (current_time < last_launched) {
+  if (current_time < old_time) {
     set_relevance(1.0);
     return;
   }
 
+  base::TimeDelta delta = current_time - old_time;
   const int kSecondsInWeek = 60 * 60 * 24 * 7;
 
   // Set the relevance to a value between 0 and 1. This function decays as the
   // time delta increases and reaches a value of 0.5 at 1 week.
   set_relevance(1 / (1 + delta.InSecondsF() / kSecondsInWeek));
 }
 
 }  // namespace app_list