Rename omaha_client and similar tokens to update_client in all contexts.

components/omaha_client/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 COMPONENTS_OMAHA_CLIENT_OMAHA_QUERY_PARAMS_DELEGATE_H_
-#define COMPONENTS_OMAHA_CLIENT_OMAHA_QUERY_PARAMS_DELEGATE_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-
-namespace omaha_client {
-
-// Embedders can specify an OmahaQueryParamsDelegate to provide additional
-// custom parameters. If not specified (Set is never called), no additional
-// parameters are added.
-class OmahaQueryParamsDelegate {
- public:
-  OmahaQueryParamsDelegate();
-  virtual ~OmahaQueryParamsDelegate();
-
-  // Returns additional parameters, if any. If there are any parameters, the
-  // string should begin with a & character.
-  virtual std::string GetExtraParams() = 0;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(OmahaQueryParamsDelegate);
-};
-
-}  // namespace omaha_client
-
-#endif  // COMPONENTS_OMAHA_CLIENT_OMAHA_QUERY_PARAMS_DELEGATE_H_