Convert indirect uses of TestingFactoryFunction

TestingFactoryFunction is a simple function pointer. It is
deprecated in favor of TestingFactory which is a Callback<>.
Convert indirect uses by using base::BindRepeating() in all
invocation of SetTestingFactory/AddTestingFactory.

This converts uses in src//chrome/browser/extensions/api/mdns.

This CL was uploaded by git cl split.

R=gene@chromium.org

Bug: 809610
Change-Id: If3c540d1d4a21995f64f4774615a27fc374c2762
Reviewed-on: https://chromium-review.googlesource.com/c/1258910
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Gene Gutnik <gene@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596597}

chrome/browser/extensions/api/mdns/mdns_api_unittest.cc

@@ -179,8 +179,8 @@ class MDnsAPITest : public extensions::ExtensionServiceTestBase {
     MDnsAPI::GetFactoryInstance()->SetTestingFactory(browser_context(),
                                                      GetMDnsFactory());
 
-    EventRouterFactory::GetInstance()->SetTestingFactory(browser_context(),
-                                                         &BuildEventRouter);
+    EventRouterFactory::GetInstance()->SetTestingFactory(
+        browser_context(), base::BindRepeating(&BuildEventRouter));
 
     // Do some sanity checking
     ASSERT_TRUE(MDnsAPI::Get(browser_context()));      // constructs MDnsAPI
@@ -273,7 +273,7 @@ class MDnsAPIDiscoveryTest : public MDnsAPITest {
 
 TEST_F(MDnsAPIDiscoveryTest, ServiceListenersAddedAndRemoved) {
   EventRouterFactory::GetInstance()->SetTestingFactory(
-      browser_context(), &MockEventRouterFactoryFunction);
+      browser_context(), base::BindRepeating(&MockEventRouterFactoryFunction));
   extensions::EventListenerMap::ListenerList listeners;
 
   extensions::EventListenerInfo listener_info(
@@ -326,7 +326,7 @@ TEST_F(MDnsAPIDiscoveryTest, ServiceListenersAddedAndRemoved) {
 
 TEST_F(MDnsAPIMaxServicesTest, OnServiceListDoesNotExceedLimit) {
   EventRouterFactory::GetInstance()->SetTestingFactory(
-      browser_context(), &MockEventRouterFactoryFunction);
+      browser_context(), base::BindRepeating(&MockEventRouterFactoryFunction));
 
   // This check should change when the [value=2048] changes in the IDL file.
   EXPECT_EQ(2048, api::mdns::MAX_SERVICE_INSTANCES_PER_EVENT);