Don't depend on /net for error codes in sky viewer.

sky/viewer/platform/platform_impl.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 "sky/viewer/platform/platform_impl.h"
 
 #include "mojo/public/cpp/application/application_impl.h"
-#include "net/base/net_errors.h"
 #include "sky/viewer/platform/weburlloader_impl.h"
 
 namespace sky {
 
+namespace {
+// This corresponds to ERR_ABORTED in net/base/net_error_list.h.
+// TODO(ppi): declare an enum in the network service mojom so that the clients
+// don't need to hard-code these values.
+const int32_t kNetErrorAborted = -3;
+
+const char kErrorDomain[] = "net";
+}  // namespace
+
 PlatformImpl::PlatformImpl(mojo::ApplicationImpl* app)
     : main_thread_task_runner_(base::MessageLoop::current()->task_runner()) {
   app->ConnectToService("mojo:network_service", &network_service_);
 }
 
 PlatformImpl::~PlatformImpl() {
 }
 
 blink::WebString PlatformImpl::defaultLocale() {
   return blink::WebString::fromUTF8("en-US");
 }
 
 base::SingleThreadTaskRunner* PlatformImpl::mainThreadTaskRunner() {
   return main_thread_task_runner_.get();
 }
 
 mojo::NetworkService* PlatformImpl::networkService() {
   return network_service_.get();
 }
 
 blink::WebURLLoader* PlatformImpl::createURLLoader() {
   return new WebURLLoaderImpl(network_service_.get());
 }
 
 blink::WebURLError PlatformImpl::cancelledError(const blink::WebURL& url)
     const {
   blink::WebURLError error;
-  error.domain = blink::WebString::fromUTF8(net::kErrorDomain);
-  error.reason = net::ERR_ABORTED;
+  error.domain = blink::WebString::fromUTF8(kErrorDomain);
+  error.reason = kNetErrorAborted;
   error.unreachableURL = url;
   error.staleCopyInCache = false;
   error.isCancellation = true;
   return error;
 }
 
 }  // namespace sky