Split cocoa_event_utils in two parts.

ui/events/events_stub.cc

 // Copyright (c) 2013 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/logging.h"
 #include "base/time/time.h"
+#include "build/build_config.h"
 #include "ui/events/event_utils.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/vector2d.h"
 
 namespace ui {
 
 // Stub implementations of platform-specific methods in events_util.h, built
 // on platform sthat currently do not have a complete implementation of events.
 
 void UpdateDeviceList() {
   NOTIMPLEMENTED();
 }
 
 EventType EventTypeFromNative(const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
   return ET_UNKNOWN;
 }
 
+#if !defined(OS_MACOSX)
 int EventFlagsFromNative(const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
   return 0;
 }
+#endif
 
 base::TimeDelta EventTimeFromNative(const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
   return base::TimeDelta();
 }
 
 gfx::Point EventLocationFromNative(const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
   return gfx::Point();
 }
@@ skipping 94 matching lines @@
   NOTIMPLEMENTED();
   return static_cast<KeyboardCode>(0);
 }
 
 const char* CodeFromNative(const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
   return "";
 }
 
 }  // namespace ui