Add chrome version information to extension update checks

chrome/common/omaha_query_params.h

+// 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.
+
+#ifndef CHROME_COMMON_OMAHA_QUERY_PARAMS_H_
+#define CHROME_COMMON_OMAHA_QUERY_PARAMS_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+
+namespace chrome {
+
+class OmahaQueryParams {
+ public:
+  enum ProdId {
+    CHROME = 0,
+    CHROMECRX,
+    CHROMIUMCRX,
+  };
+
+  // Generates a string of URL query paramaters to be used when getting
+  // component and extension updates. Includes the following fields: os, arch,
+  // prod, prodchannel, prodversion.
+  static std::string Get(ProdId prod);
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(OmahaQueryParams);
+};
+
+}  // namespace chrome
+
+#endif  // CHROME_COMMON_OMAHA_QUERY_PARAMS_H_