Move OmahaQueryParams to a component and add a delegate interface.

chrome/browser/omaha_query_params/chrome_omaha_query_params_delegate.h

+// 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.
+
+#ifndef CHROME_BROWSER_OMAHA_QUERY_PARAMS_CHROME_OMAHA_QUERY_PARAMS_DELEGATE_H_
+#define CHROME_BROWSER_OMAHA_QUERY_PARAMS_CHROME_OMAHA_QUERY_PARAMS_DELEGATE_H_
+
+#include "components/omaha_query_params/omaha_query_params.h"
+
+class ChromeOmahaQueryParamsDelegate : public OmahaQueryParamsDelegate {
+ public:
+  ChromeOmahaQueryParamsDelegate();
+  virtual ~ChromeOmahaQueryParamsDelegate();
+
+  // Gets the LazyInstance for ChromeOmahaQueryParamsDelegate.
+  static ChromeOmahaQueryParamsDelegate* GetInstance();
+
+  // OmahaQueryParamsDelegate:
+  virtual std::string GetExtraParams() OVERRIDE;
+
+  // Returns the value we use for the "updaterchannel=" and "prodchannel="
+  // parameters. Possible return values include: "canary", "dev", "beta", and
+  // "stable".
+  static const char* GetChannelString();
+
+  // Returns the language for the present locale. Possible return values are
+  // standard tags for languages, such as "en", "en-US", "de", "fr", "af", etc.
+  static const char* GetLang();
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeOmahaQueryParamsDelegate);
+};
+
+#endif  // CHROME_BROWSER_OMAHA_QUERY_PARAMS_CHROME_OMAHA_QUERY_PARAMS_DELEGATE_H_