Add chrome version information to extension update checks

chrome/common/omaha_query_params.h

Index: chrome/common/omaha_query_params.h
diff --git a/chrome/common/omaha_query_params.h b/chrome/common/omaha_query_params.h
new file mode 100644
index 0000000000000000000000000000000000000000..a222b7e5372cea21f547fb06acc1fe73ec963ae0
--- /dev/null
+++ b/chrome/common/omaha_query_params.h
@@ -0,0 +1,18 @@
+// 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 {
+
+std::string GetOmahaQueryParams(const std::string& prod);

[asargent_no_longer_on_chrome, 2013/03/06 00:45:06]

nit: this method could use a brief overview comment explaining what it's for,
and what the meaning of the |prod| parameter is. 

Also, would it make sense to have |prod| just be an enum like { CHROME,
CHROMECRX, CHROMIUMCRX } which we'd map to a string in the implementation of
this method? Do we expect to add other possible values anytime soon?

[jackhou, 2013/03/06 03:56:36]

Done.

Not sure if we expect to add other values, but I think it's clearer as an enum
in either case.

+
+}  // namespace chrome
+
+#endif  // CHROME_COMMON_OMAHA_QUERY_PARAMS_H_