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/identity.

This CL was uploaded by git cl split.

R=courage@chromium.org

Bug: 809610
Change-Id: Id702299e37de9a9f224e11f948537c13df068fc6
Reviewed-on: https://chromium-review.googlesource.com/c/1259042
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Michael Courage <courage@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596644}

chrome/browser/extensions/api/identity/identity_apitest.cc

@@ -8,6 +8,7 @@
 #include <utility>
 #include <vector>
 
+#include "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
@@ -436,11 +437,12 @@ class IdentityTestWithSignin : public AsyncExtensionBrowserTest {
     // creating the browser so that a bunch of classes don't register as
     // observers and end up needing to unregister when the fake is substituted.
     SigninManagerFactory::GetInstance()->SetTestingFactory(
-        context, &BuildFakeSigninManagerBase);
+        context, base::BindRepeating(&BuildFakeSigninManagerBase));
     ProfileOAuth2TokenServiceFactory::GetInstance()->SetTestingFactory(
-        context, &BuildFakeProfileOAuth2TokenService);
+        context, base::BindRepeating(&BuildFakeProfileOAuth2TokenService));
     GaiaCookieManagerServiceFactory::GetInstance()->SetTestingFactory(
-        context, &BuildFakeGaiaCookieManagerServiceNoFakeUrlFetcher);
+        context, base::BindRepeating(
+                     &BuildFakeGaiaCookieManagerServiceNoFakeUrlFetcher));
 
     // Ensure that AccountFetcherService is (1) created at all and (2) created
     // early enough for it to observe the Profile initialization process and