Rename omaha_client and similar tokens to update_client in all contexts.

components/omaha_client/omaha_query_params_delegate.cc

Index: components/omaha_client/omaha_query_params_delegate.cc
diff --git a/components/omaha_client/omaha_query_params_delegate.cc b/components/omaha_client/omaha_query_params_delegate.cc
deleted file mode 100644
index 1da18549e559aa749b6cf861a9005d26fe4a5cc7..0000000000000000000000000000000000000000
--- a/components/omaha_client/omaha_query_params_delegate.cc
+++ /dev/null
@@ -1,15 +0,0 @@
-// 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.
-
-#include "components/omaha_client/omaha_query_params_delegate.h"
-
-namespace omaha_client {
-
-OmahaQueryParamsDelegate::OmahaQueryParamsDelegate() {
-}
-
-OmahaQueryParamsDelegate::~OmahaQueryParamsDelegate() {
-}
-
-}  // namespace omaha_client