TabManagerDelegate: Better prioritize ARC processes.

chrome/browser/memory/tab_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/memory/tab_manager.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <set>
@@ skipping 705 matching lines @@
 
 TabManager::WebContentsData* TabManager::GetWebContentsData(
     content::WebContents* contents) const {
   WebContentsData::CreateForWebContents(contents);
   auto web_contents_data = WebContentsData::FromWebContents(contents);
   web_contents_data->set_test_tick_clock(test_tick_clock_);
   return web_contents_data;
 }
 
 // static
-bool TabManager::CompareTabStats(TabStats first, TabStats second) {
+bool TabManager::CompareTabStats(const TabStats& first,
+                                 const TabStats& second) {
   // Being currently selected is most important to protect.
   if (first.is_selected != second.is_selected)
     return first.is_selected;
 
   // Protect tabs with pending form entries.
   if (first.has_form_entry != second.has_form_entry)
     return first.has_form_entry;
 
   // Protect streaming audio and video conferencing tabs as these are similar to
   // active tabs.
@@ skipping 163 matching lines @@
   observers_.RemoveObserver(observer);
 }
 
 void TabManager::OnDiscardedStateChange(content::WebContents* contents,
                                         bool is_discarded) {
   FOR_EACH_OBSERVER(TabManagerObserver, observers_,
                     OnDiscardedStateChange(contents, is_discarded));
 }
 
 }  // namespace memory