Moves LowMemoryObserver into chromeos and renames

chrome/browser/chromeos/memory/oom_priority_manager.h

Index: chrome/browser/chromeos/memory/oom_priority_manager.h
diff --git a/chrome/browser/chromeos/memory/oom_priority_manager.h b/chrome/browser/chromeos/memory/oom_priority_manager.h
index 23e956a67483c7e1868f4730e94fb35336ea8cc8..59f072b16baf9e68451f29d4621c7964616db7d9 100644
--- a/chrome/browser/chromeos/memory/oom_priority_manager.h
+++ b/chrome/browser/chromeos/memory/oom_priority_manager.h
@@ -16,6 +16,7 @@
 #include "base/synchronization/lock.h"
 #include "base/time.h"
 #include "base/timer.h"
+#include "chromeos/memory/low_memory_listener_delegate.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
@@ -23,7 +24,7 @@ class GURL;
 
 namespace chromeos {
 
-class LowMemoryObserver;
+class LowMemoryListener;
 
 // The OomPriorityManager periodically checks (see
 // ADJUSTMENT_INTERVAL_SECONDS in the source) the status of renderers
@@ -34,7 +35,8 @@ class LowMemoryObserver;
 //
 // The algorithm used favors killing tabs that are not selected, not pinned,
 // and have been idle for longest, in that order of priority.
-class OomPriorityManager : public content::NotificationObserver {
+class OomPriorityManager : public content::NotificationObserver,
+                           public LowMemoryListenerDelegate {
  public:
   OomPriorityManager();
   virtual ~OomPriorityManager();
@@ -121,10 +123,14 @@ class OomPriorityManager : public content::NotificationObserver {
 
   static bool CompareTabStats(TabStats first, TabStats second);
 
+  // NotificationObserver overrides:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+  // LowMemoryListenerDelegate overrides:
+  virtual void OnMemoryLow() OVERRIDE;
+
   base::RepeatingTimer<OomPriorityManager> timer_;
   base::OneShotTimer<OomPriorityManager> focus_tab_score_adjust_timer_;
   base::RepeatingTimer<OomPriorityManager> recent_tab_discard_timer_;
@@ -139,7 +145,7 @@ class OomPriorityManager : public content::NotificationObserver {
 
   // Observer for the kernel low memory signal.  NULL if tab discarding is
   // disabled.
-  scoped_ptr<LowMemoryObserver> low_memory_observer_;
+  scoped_ptr<LowMemoryListener> low_memory_listener_;
 
   // Wall-clock time when the priority manager started running.
   base::TimeTicks start_time_;