cros: Protect app windows from out-of-memory kills

chrome/browser/chromeos/oom_priority_manager.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_OOM_PRIORITY_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_OOM_PRIORITY_MANAGER_H_
 
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ skipping 45 matching lines @@
   // Tab discard happens sometime later, as collecting the statistics touches
   // multiple threads and takes time.
   void LogMemoryAndDiscardTab();
 
  private:
   FRIEND_TEST_ALL_PREFIXES(OomPriorityManagerTest, Comparator);
 
   struct TabStats {
     TabStats();
     ~TabStats();
+    bool is_app;  // browser window is an app
     bool is_pinned;
     bool is_selected;  // selected in the currently active browser window
     bool is_discarded;
     bool sudden_termination_allowed;
     base::TimeTicks last_selected;
     base::ProcessHandle renderer_handle;
     string16 title;
     int64 tab_contents_id;  // unique ID per WebContents
   };
   typedef std::vector<TabStats> TabStatsList;
@@ skipping 57 matching lines @@
 
   // Number of times we have discarded a tab, for statistics.
   int discard_count_;
 
   DISALLOW_COPY_AND_ASSIGN(OomPriorityManager);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_CHROMEOS_OOM_PRIORITY_MANAGER_H_