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/android/signin.

This CL was uploaded by git cl split.

R=bsazonov@chromium.org

Bug: 809610
Change-Id: I6f1d6fcc1e311286e193d7be174fc5cf6687c309
Reviewed-on: https://chromium-review.googlesource.com/c/1258360
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596564}

chrome/browser/android/signin/signin_manager_android_unittest.cc

@@ -7,6 +7,7 @@
 #include <memory>
 #include <set>
 
+#include "base/bind.h"
 #include "base/memory/ref_counted.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
@@ -71,7 +72,7 @@ class SigninManagerAndroidTest : public ::testing::Test {
     // Creating a BookmarkModel also a creates a StubOfflinePageModel.
     // We need to replace this with a mock that responds to deletions.
     offline_pages::OfflinePageModelFactory::GetInstance()->SetTestingFactory(
-        profile_, BuildOfflinePageModel);
+        profile_, base::BindRepeating(&BuildOfflinePageModel));
     bookmarks::BookmarkModel* bookmark_model =
         BookmarkModelFactory::GetForBrowserContext(profile_);
     bookmarks::test::WaitForBookmarkModelToLoad(bookmark_model);