Add fallback URLFetcher factory to GcdPrivateAPITest.

chrome/browser/extensions/api/gcd_private/gcd_private_apitest.cc

Index: chrome/browser/extensions/api/gcd_private/gcd_private_apitest.cc
diff --git a/chrome/browser/extensions/api/gcd_private/gcd_private_apitest.cc b/chrome/browser/extensions/api/gcd_private/gcd_private_apitest.cc
index 17e92d7ebfbe1ad90aedb9eb450e6cd3064a79c7..12ec84f4cf1f51427c37ed125376f0f3f4359853 100644
--- a/chrome/browser/extensions/api/gcd_private/gcd_private_apitest.cc
+++ b/chrome/browser/extensions/api/gcd_private/gcd_private_apitest.cc
@@ -216,7 +216,7 @@ class FakeGCDApiFlowFactory
 
 class GcdPrivateAPITest : public ExtensionApiTest {
  public:
-  GcdPrivateAPITest() : url_fetcher_factory_(NULL) {
+  GcdPrivateAPITest() : url_fetcher_factory_(&url_fetcher_impl_factory_) {
 #if defined(ENABLE_MDNS)
     test_service_discovery_client_ =
         new local_discovery::TestServiceDiscoveryClient();
@@ -233,6 +233,7 @@ class GcdPrivateAPITest : public ExtensionApiTest {
 
  protected:
   FakeGCDApiFlowFactory api_flow_factory_;
+  net::URLFetcherImplFactory url_fetcher_impl_factory_;
   net::FakeURLFetcherFactory url_fetcher_factory_;
 
 #if defined(ENABLE_MDNS)
@@ -288,8 +289,7 @@ IN_PROC_BROWSER_TEST_F(GcdPrivateAPITest, AddAfter) {
       RunExtensionSubtest("gcd_private/api", "receive_new_device.html"));
 }
 
-// http://crbug.com/312328
-IN_PROC_BROWSER_TEST_F(GcdPrivateAPITest, DISABLED_AddRemove) {
+IN_PROC_BROWSER_TEST_F(GcdPrivateAPITest, AddRemove) {
   test_service_discovery_client_->SimulateReceive(kAnnouncePacket,
                                                   sizeof(kAnnouncePacket));