Make DisplayInfoProvider an interface

chrome/browser/extensions/api/system_display/display_info_provider_aura.cc

Index: chrome/browser/extensions/api/system_display/display_info_provider_aura.cc
diff --git a/chrome/browser/extensions/api/system_display/display_info_provider_aura.cc b/chrome/browser/extensions/api/system_display/display_info_provider_aura.cc
deleted file mode 100644
index 84a610542ce54614c2b3c3b2a1b95cc887a81831..0000000000000000000000000000000000000000
--- a/chrome/browser/extensions/api/system_display/display_info_provider_aura.cc
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 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 "chrome/browser/extensions/api/system_display/display_info_provider.h"
-
-namespace extensions {
-
-bool DisplayInfoProvider::SetInfo(const std::string& display_id,
-    const api::system_display::DisplayProperties& info,
-    std::string* error) {
-  *error = "Not Implemented";
-  return false;
-}
-
-void DisplayInfoProvider::UpdateDisplayUnitInfoForPlatform(
-    const gfx::Display& display,
-    extensions::api::system_display::DisplayUnitInfo* unit) {
-  NOTIMPLEMENTED();
-}
-
-}  // namespace extensions