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/thumbnails.

This CL was uploaded by git cl split.

R=treib@chromium.org

Bug: 809610
Change-Id: If593d807b93661db5414e15acb5efb46c93e99a2
Reviewed-on: https://chromium-review.googlesource.com/c/1259026
Commit-Queue: Sylvain Defresne <sdefresne@chromium.org>
Reviewed-by: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596545}

chrome/browser/thumbnails/thumbnail_browsertest.cc

@@ -5,6 +5,7 @@
 #include <memory>
 #include <utility>
 
+#include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_refptr.h"
@@ -178,7 +179,7 @@ class ThumbnailTest : public InProcessBrowserTest {
 
   void OnWillCreateBrowserContextServices(content::BrowserContext* context) {
     ThumbnailServiceFactory::GetInstance()->SetTestingFactory(
-        context, &ThumbnailTest::CreateThumbnailService);
+        context, base::BindRepeating(&ThumbnailTest::CreateThumbnailService));
   }
 
   std::unique_ptr<

chrome/browser/thumbnails/thumbnail_service_unittest.cc

@@ -80,7 +80,8 @@ scoped_refptr<RefcountedKeyedService> BuildMockTopSites(
 class MockProfile : public TestingProfile {
  public:
   MockProfile() {
-    TopSitesFactory::GetInstance()->SetTestingFactory(this, BuildMockTopSites);
+    TopSitesFactory::GetInstance()->SetTestingFactory(
+        this, base::BindRepeating(&BuildMockTopSites));
   }
 
   void AddKnownURL(const GURL& url, const history::ThumbnailScore& score) {