Changing CloudPrintURLFetcher instantiation to be more testable

chrome/service/cloud_print/cloud_print_url_fetcher.cc

Index: chrome/service/cloud_print/cloud_print_url_fetcher.cc
diff --git a/chrome/service/cloud_print/cloud_print_url_fetcher.cc b/chrome/service/cloud_print/cloud_print_url_fetcher.cc
index dc2a46869f733f1aac4dce371c4c4520e303c0a5..f28dac0e1af4e0e4d9efa9d10eb81ef6b29590cd 100644
--- a/chrome/service/cloud_print/cloud_print_url_fetcher.cc
+++ b/chrome/service/cloud_print/cloud_print_url_fetcher.cc
@@ -20,6 +20,25 @@
 
 namespace cloud_print {
 
+static CloudPrintURLFetcherFactory* g_factory = NULL;
+
+// static
+CloudPrintURLFetcher* CloudPrintURLFetcher::Create() {
+  CloudPrintURLFetcherFactory* factory = CloudPrintURLFetcher::factory();
+  return factory ? factory->CreateCloudPrintURLFetcher() :
+      new CloudPrintURLFetcher;
+}
+
+// static
+CloudPrintURLFetcherFactory* CloudPrintURLFetcher::factory() {
+  return g_factory;
+}
+
+// static
+void CloudPrintURLFetcher::set_factory(CloudPrintURLFetcherFactory* factory) {
+  g_factory = factory;
+}
+
 CloudPrintURLFetcher::ResponseAction
 CloudPrintURLFetcher::Delegate::HandleRawResponse(
     const net::URLFetcher* source,