Turn ThreadPriority enum into an enum class.

base/threading/platform_thread_win.cc

 // Copyright (c) 2012 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/threading/platform_thread.h"
 
 #include "base/debug/alias.h"
 #include "base/debug/profiler.h"
 #include "base/logging.h"
 #include "base/threading/thread_id_name_manager.h"
@@ skipping 219 matching lines @@
   CloseHandle(thread_handle.handle_);
 }
 
 // static
 void PlatformThread::SetThreadPriority(PlatformThreadHandle handle,
                                        ThreadPriority priority) {
   DCHECK(!handle.is_null());
 
   int desired_priority = THREAD_PRIORITY_ERROR_RETURN;
   switch (priority) {
-    case kThreadPriority_Normal:
+    case ThreadPriority::BACKGROUND:
+      desired_priority = THREAD_PRIORITY_LOWEST;
+      break;
+    case ThreadPriority::NORMAL:
       desired_priority = THREAD_PRIORITY_NORMAL;
       break;
-    case kThreadPriority_RealtimeAudio:
-      desired_priority = THREAD_PRIORITY_TIME_CRITICAL;
-      break;
-    case kThreadPriority_Display:
+    case ThreadPriority::DISPLAY:
       desired_priority = THREAD_PRIORITY_ABOVE_NORMAL;
       break;
-    case kThreadPriority_Background:
-      desired_priority = THREAD_PRIORITY_LOWEST;
+    case ThreadPriority::REALTIME_AUDIO:
+      desired_priority = THREAD_PRIORITY_TIME_CRITICAL;
       break;
     default:
       NOTREACHED() << "Unknown priority.";
       break;
   }
   DCHECK_NE(desired_priority, THREAD_PRIORITY_ERROR_RETURN);
 
 #ifndef NDEBUG
   const BOOL success =
 #endif
       ::SetThreadPriority(handle.handle_, desired_priority);
   DPLOG_IF(ERROR, !success) << "Failed to set thread priority to "
                             << desired_priority;
 }
 
 // static
 ThreadPriority PlatformThread::GetThreadPriority(PlatformThreadHandle handle) {
   DCHECK(!handle.is_null());
 
   int priority = ::GetThreadPriority(handle.handle_);
   switch (priority) {
+    case THREAD_PRIORITY_LOWEST:
+      return ThreadPriority::BACKGROUND;
     case THREAD_PRIORITY_NORMAL:
-      return kThreadPriority_Normal;
+      return ThreadPriority::NORMAL;
+    case THREAD_PRIORITY_ABOVE_NORMAL:
+      return ThreadPriority::DISPLAY;
     case THREAD_PRIORITY_TIME_CRITICAL:
-      return kThreadPriority_RealtimeAudio;
-    case THREAD_PRIORITY_ABOVE_NORMAL:
-      return kThreadPriority_Display;
-    case THREAD_PRIORITY_LOWEST:
-      return kThreadPriority_Background;
+      return ThreadPriority::REALTIME_AUDIO;
     case THREAD_PRIORITY_ERROR_RETURN:
       DPCHECK(false) << "GetThreadPriority error";  // Falls through.
     default:
       NOTREACHED() << "Unexpected priority: " << priority;
-      return kThreadPriority_Normal;
+      return ThreadPriority::NORMAL;
   }
 }
 
 }  // namespace base