Allow compiling with enable_print_preview=false

chrome/browser/extensions/api/cloud_print_private/cloud_print_private_api.cc

 // Copyright (c) 2012 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 "chrome/browser/extensions/api/cloud_print_private/cloud_print_private_api.h"
 
 #include <string>
 
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/printing/cloud_print/cloud_print_proxy_service.h"
 #include "chrome/browser/printing/cloud_print/cloud_print_proxy_service_factory.h"
 #include "chrome/common/extensions/api/cloud_print_private.h"
 #include "google_apis/google_api_keys.h"
 #include "net/base/network_interfaces.h"
 
 namespace extensions {
 
 namespace {
 
+#if defined(ENABLE_PRINT_PREVIEW)
 const char kErrorIncognito[] = "Cannot access in incognito mode";
+#endif
 
 CloudPrintTestsDelegate* g_instance = nullptr;
 
 }  // namespace
 
 CloudPrintTestsDelegate* CloudPrintTestsDelegate::Get() {
   return g_instance;
 }
 
 CloudPrintTestsDelegate::CloudPrintTestsDelegate() {
@@ skipping 96 matching lines @@
 bool CloudPrintPrivateGetClientIdFunction::RunAsync() {
   SetResult(new base::StringValue(
       CloudPrintTestsDelegate::Get()
           ? CloudPrintTestsDelegate::Get()->GetClientId()
           : google_apis::GetOAuth2ClientID(google_apis::CLIENT_CLOUD_PRINT)));
   SendResponse(true);
   return true;
 }
 
 }  // namespace extensions