Update default policy for memory coordinator

content/browser/memory/memory_coordinator_default_policy.h

Index: content/browser/memory/memory_coordinator_default_policy.h
diff --git a/content/browser/memory/memory_coordinator_default_policy.h b/content/browser/memory/memory_coordinator_default_policy.h
index 3bc9fad48d9a4c174592ecb33ef6935a87863219..29dd4761fb02b25b54c4b32fcbb1e8bebf0a5779 100644
--- a/content/browser/memory/memory_coordinator_default_policy.h
+++ b/content/browser/memory/memory_coordinator_default_policy.h
@@ -21,18 +21,6 @@ class MemoryCoordinatorDefaultPolicy : public MemoryCoordinatorImpl::Policy {
                                 bool is_visible) override;
 
  private:
-  // Set the provided memory_state to all child processes.
-  void SetMemoryStateToAllChildren(MemoryState memory_state);
-
-  enum class PurgeTarget {
-    BACKGROUNDED,
-    ALL,
-  };
-
-  // Tries to find a candidate child process for purging memory and asks the
-  // child to purge memory.
-  bool TryToPurgeMemoryFromChildren(PurgeTarget target);
-
   // Not owned.
   MemoryCoordinatorImpl* coordinator_;
 };