Make `content` target build without unused data members on Linux.

content/browser/webui/url_data_manager_backend_unittest.cc

 // 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 "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "content/browser/webui/url_data_manager_backend.h"
 #include "content/public/test/mock_resource_context.h"
 #include "content/public/test/test_browser_thread_bundle.h"
@@ skipping 27 matching lines @@
  private:
   DISALLOW_COPY_AND_ASSIGN(CancelAfterFirstReadURLRequestDelegate);
 };
 
 class UrlDataManagerBackendTest : public testing::Test {
  public:
   UrlDataManagerBackendTest() {
     // URLRequestJobFactory takes ownership of the passed in ProtocolHandler.
     url_request_job_factory_.SetProtocolHandler(
         "chrome", URLDataManagerBackend::CreateProtocolHandler(
-                      &resource_context_, false, nullptr, nullptr));
+                      &resource_context_, false, nullptr));
     url_request_context_.set_job_factory(&url_request_job_factory_);
   }
 
   scoped_ptr<net::URLRequest> CreateRequest(net::URLRequest::Delegate* delegate,
                                             const char* origin) {
     scoped_ptr<net::URLRequest> request = url_request_context_.CreateRequest(
         GURL("chrome://resources/polymer/v1_0/polymer/polymer-extracted.js"),
         net::HIGHEST, delegate);
     request->SetExtraRequestHeaderByName("Origin", origin, true);
     return request;
@@ skipping 65 matching lines @@
   scoped_ptr<net::URLRequest> error_request =
         url_request_context_.CreateRequest(
         GURL("chrome://network-error/-123456789"), net::HIGHEST, &delegate_);
   error_request->Start();
   base::RunLoop().Run();
   EXPECT_EQ(net::URLRequestStatus::FAILED, error_request->status().status());
   EXPECT_EQ(net::ERR_INVALID_URL, error_request->status().error());
 }
 
 }  // namespace content