Move OmahaQueryParams to a component and add a delegate interface.

apps/shell/browser/shell_omaha_query_params_delegate.h

Index: apps/shell/browser/shell_omaha_query_params_delegate.h
diff --git a/apps/shell/browser/shell_omaha_query_params_delegate.h b/apps/shell/browser/shell_omaha_query_params_delegate.h
new file mode 100644
index 0000000000000000000000000000000000000000..fc30292995290d393dea8c687a5a0680c896b3e8
--- /dev/null
+++ b/apps/shell/browser/shell_omaha_query_params_delegate.h
@@ -0,0 +1,26 @@
+// 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 APPS_SHELL_BROWSER_SHELL_OMAHA_QUERY_PARAMS_DELEGATE_H_
+#define APPS_SHELL_BROWSER_SHELL_OMAHA_QUERY_PARAMS_DELEGATE_H_
+
+#include "components/omaha_query_params/omaha_query_params_delegate.h"
+
+namespace extensions {
+
+class ShellOmahaQueryParamsDelegate
+    : public omaha_query_params::OmahaQueryParamsDelegate {
+ public:
+  ShellOmahaQueryParamsDelegate();
+  virtual ~ShellOmahaQueryParamsDelegate();
+
+  virtual std::string GetExtraParams() OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ShellOmahaQueryParamsDelegate);
+};
+
+}  // namespace extensions
+
+#endif  // APPS_SHELL_BROWSER_SHELL_OMAHA_QUERY_PARAMS_DELEGATE_H_