Make scoped enums output streamable.

base/task_scheduler/task_traits.cc

 // Copyright 2016 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.
 
 #include "base/task_scheduler/task_traits.h"
 
 #include <ostream>
 
 namespace base {
 
@@ skipping 16 matching lines @@
   priority_ = priority;
   return *this;
 }
 
 TaskTraits& TaskTraits::WithShutdownBehavior(
     TaskShutdownBehavior shutdown_behavior) {
   shutdown_behavior_ = shutdown_behavior;
   return *this;
 }
 
-std::ostream& operator<<(std::ostream& os, const TaskPriority& task_priority) {
-  switch (task_priority) {
-    case TaskPriority::BACKGROUND:
-      os << "BACKGROUND";
-      break;
-    case TaskPriority::USER_VISIBLE:
-      os << "USER_VISIBLE";
-      break;
-    case TaskPriority::USER_BLOCKING:
-      os << "USER_BLOCKING";
-      break;
-  }
-  return os;
-}
-
-std::ostream& operator<<(std::ostream& os,
-                         const TaskShutdownBehavior& shutdown_behavior) {
-  switch (shutdown_behavior) {
-    case TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN:
-      os << "CONTINUE_ON_SHUTDOWN";
-      break;
-    case TaskShutdownBehavior::SKIP_ON_SHUTDOWN:
-      os << "SKIP_ON_SHUTDOWN";
-      break;
-    case TaskShutdownBehavior::BLOCK_SHUTDOWN:
-      os << "BLOCK_SHUTDOWN";
-      break;
-  }
-  return os;
-}
-
 }  // namespace base