Avoid discarding freshly created background tabs

chrome/browser/chromeos/memory/oom_priority_manager.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 "chrome/browser/chromeos/memory/oom_priority_manager.h"
 
 #include <algorithm>
 #include <set>
 #include <vector>
 
@@ skipping 431 matching lines @@
   if (first.is_playing_audio != second.is_playing_audio)
     return first.is_playing_audio;
 
   // TODO(jamescook): Incorporate sudden_termination_allowed into the sort
   // order.  We don't do this now because pages with unload handlers set
   // sudden_termination_allowed false, and that covers too many common pages
   // with ad networks and statistics scripts.  Ideally we would like to check
   // for beforeUnload handlers, which are likely to present a dialog asking
   // if the user wants to discard state.  crbug.com/123049
 
-  // Being more recently selected is more important.
-  return first.last_selected > second.last_selected;
+  // Being more recently active is more important.
+  return first.last_active > second.last_active;
 }
 
 void OomPriorityManager::AdjustFocusedTabScoreOnFileThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
   base::AutoLock pid_to_oom_score_autolock(pid_to_oom_score_lock_);
   content::ZygoteHost::GetInstance()->AdjustRendererOOMScore(
       focused_tab_pid_, chrome::kLowestRendererOomScore);
   pid_to_oom_score_[focused_tab_pid_] = chrome::kLowestRendererOomScore;
 }
 
@@ skipping 107 matching lines @@
       WebContents* contents = model->GetWebContentsAt(i);
       if (!contents->IsCrashed()) {
         TabStats stats;
         stats.is_app = is_browser_for_app;
         stats.is_reloadable_ui =
             IsReloadableUI(contents->GetLastCommittedURL());
         stats.is_playing_audio = chrome::IsPlayingAudio(contents);
         stats.is_pinned = model->IsTabPinned(i);
         stats.is_selected = browser_active && model->IsTabSelected(i);
         stats.is_discarded = model->IsTabDiscarded(i);
-        stats.last_selected = contents->GetLastSelectedTime();
+        stats.last_active = contents->GetLastActiveTime();
         stats.renderer_handle = contents->GetRenderProcessHost()->GetHandle();
         stats.title = contents->GetTitle();
         stats.tab_contents_id = IdFromWebContents(contents);
         stats_list.push_back(stats);
       }
     }
     // We process the active browser window in the first iteration.
     browser_active = false;
   }
   // Sort the data we collected so that least desirable to be
@@ skipping 57 matching lines @@
     priority += priority_increment;
   }
 }
 
 void OomPriorityManager::OnMemoryLow() {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   LogMemoryAndDiscardTab();
 }
 
 }  // namespace chromeos