Mojo: Rename (Mojo)WaitFlagsState -> (Mojo)HandleSignalsState.

mojo/system/platform_handle_dispatcher.cc

 // Copyright 2014 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 "mojo/system/platform_handle_dispatcher.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 
@@ skipping 96 matching lines @@
     serialization->platform_handle_index = platform_handles->size();
     platform_handles->push_back(platform_handle_.release());
   } else {
     serialization->platform_handle_index = kInvalidPlatformHandleIndex;
   }
 
   *actual_size = sizeof(SerializedPlatformHandleDispatcher);
   return true;
 }
 
-WaitFlagsState PlatformHandleDispatcher::GetWaitFlagsStateNoLock() const {
-  return WaitFlagsState();
+HandleSignalsState
+    PlatformHandleDispatcher::GetHandleSignalsStateNoLock() const {
+  return HandleSignalsState();
 }
 
 }  // namespace system
 }  // namespace mojo