cros: Log per-process memory use on low memory events

chrome/browser/oom_priority_manager.h

Index: chrome/browser/oom_priority_manager.h
diff --git a/chrome/browser/oom_priority_manager.h b/chrome/browser/oom_priority_manager.h
index 866ec4de572f64dd4d53e6822dc5c5bfd89bec7f..7c91d043301e5bf6408aca9e5cba7f01eee82c93 100644
--- a/chrome/browser/oom_priority_manager.h
+++ b/chrome/browser/oom_priority_manager.h
@@ -50,6 +50,11 @@ class OomPriorityManager : public content::NotificationObserver {
   // Returns true if it successfully found a tab and discarded it.
   bool DiscardTab();
 
+  // Log memory statistics for the running processes, then discards a tab.
+  // Tab discard happens sometime later, as collecting the statistics touches
+  // multiple threads and takes time.
+  void LogMemoryAndDiscardTab();
+
  private:
   FRIEND_TEST_ALL_PREFIXES(OomPriorityManagerTest, Comparator);