Rename omaha_client and similar tokens to update_client in all contexts.

extensions/shell/browser/shell_omaha_query_params_delegate.cc

Index: extensions/shell/browser/shell_omaha_query_params_delegate.cc
diff --git a/extensions/shell/browser/shell_omaha_query_params_delegate.cc b/extensions/shell/browser/shell_omaha_query_params_delegate.cc
deleted file mode 100644
index cd37c718abead6174aaa9bd66d6e396f52e3e0fb..0000000000000000000000000000000000000000
--- a/extensions/shell/browser/shell_omaha_query_params_delegate.cc
+++ /dev/null
@@ -1,22 +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 "extensions/shell/browser/shell_omaha_query_params_delegate.h"
-
-namespace extensions {
-
-ShellOmahaQueryParamsDelegate::ShellOmahaQueryParamsDelegate() {
-}
-
-ShellOmahaQueryParamsDelegate::~ShellOmahaQueryParamsDelegate() {
-}
-
-std::string ShellOmahaQueryParamsDelegate::GetExtraParams() {
-  // This version number is high enough to be supported by Omaha
-  // (below 31 is unsupported), but it's fake enough to be obviously
-  // not a Chrome release.
-  return "&prodversion=38.1234.5678.9";
-}
-
-}  // namespace extensions