Move chrome.runtime to //extensions.

extensions/browser/api/runtime/runtime_api_delegate.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 "extensions/browser/api/runtime/runtime_api_delegate.h"
+
+using extensions::core_api::runtime::GetPlatformInfo::Results::PlatformInfo;
+
+namespace extensions {
+
+RuntimeAPIDelegate::UpdateCheckResult::UpdateCheckResult(
+    bool success,
+    const std::string& response,
+    const std::string& version)
+    : success(success), response(response), version(version) {
+}
+
+}  // namespace extensions