Remove stl_util's STLDeleteContainerPairSecondPointers.

chrome/browser/ui/ash/launcher/browser_status_monitor.h

Index: chrome/browser/ui/ash/launcher/browser_status_monitor.h
diff --git a/chrome/browser/ui/ash/launcher/browser_status_monitor.h b/chrome/browser/ui/ash/launcher/browser_status_monitor.h
index 0ef56518e8720eea88ad8f77949be0e64bc66ab2..7fd0f4592ba4393a39c63f999cafb65733768140 100644
--- a/chrome/browser/ui/ash/launcher/browser_status_monitor.h
+++ b/chrome/browser/ui/ash/launcher/browser_status_monitor.h
@@ -100,10 +100,6 @@ class BrowserStatusMonitor : public aura::client::ActivationChangeObserver,
   class LocalWebContentsObserver;
   class SettingsWindowObserver;
 
-  typedef std::map<Browser*, std::string> BrowserToAppIDMap;
-  typedef std::map<content::WebContents*, LocalWebContentsObserver*>
-      WebContentsToObserverMap;
-
   // Create LocalWebContentsObserver for |contents|.
   void AddWebContentsObserver(content::WebContents* contents);
 
@@ -119,8 +115,9 @@ class BrowserStatusMonitor : public aura::client::ActivationChangeObserver,
 
   ChromeLauncherController* launcher_controller_;
 
-  BrowserToAppIDMap browser_to_app_id_map_;
-  WebContentsToObserverMap webcontents_to_observer_map_;
+  std::map<Browser*, std::string> browser_to_app_id_map_;
+  std::map<content::WebContents*, std::unique_ptr<LocalWebContentsObserver>>
+      webcontents_to_observer_map_;
   std::unique_ptr<SettingsWindowObserver> settings_window_observer_;
 
   BrowserTabStripTracker browser_tab_strip_tracker_;