[ios] Moved WebUI provider code to ios/web.

ios/public/provider/web/web_ui_ios_controller.cc

Index: ios/public/provider/web/web_ui_ios_controller.cc
diff --git a/ios/public/provider/web/web_ui_ios_controller.cc b/ios/public/provider/web/web_ui_ios_controller.cc
deleted file mode 100644
index 1909d4f763a119c1175185d3a65ddfc36571e0f3..0000000000000000000000000000000000000000
--- a/ios/public/provider/web/web_ui_ios_controller.cc
+++ /dev/null
@@ -1,16 +0,0 @@
-// 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 "ios/public/provider/web/web_ui_ios_controller.h"
-
-namespace web {
-
-bool WebUIIOSController::OverrideHandleWebUIIOSMessage(
-    const GURL& source_url,
-    const std::string& message,
-    const base::ListValue& args) {
-  return false;
-}
-
-}  // namespace web