Topsites become keyedService based.

chrome/browser/thumbnails/thumbnail_service_impl.cc

Index: chrome/browser/thumbnails/thumbnail_service_impl.cc
diff --git a/chrome/browser/thumbnails/thumbnail_service_impl.cc b/chrome/browser/thumbnails/thumbnail_service_impl.cc
index 8f572d39b14994962831bcaef78b10eaf32e672e..74841cbaf584c255215366b69a13d5e26df24ba3 100644
--- a/chrome/browser/thumbnails/thumbnail_service_impl.cc
+++ b/chrome/browser/thumbnails/thumbnail_service_impl.cc
@@ -8,6 +8,7 @@
 #include "base/memory/ref_counted_memory.h"
 #include "base/time/time.h"
 #include "chrome/browser/history/history_service.h"
+#include "chrome/browser/history/top_sites_factory.h"
 #include "chrome/browser/thumbnails/content_based_thumbnailing_algorithm.h"
 #include "chrome/browser/thumbnails/simple_thumbnail_crop.h"
 #include "chrome/browser/thumbnails/thumbnailing_context.h"
@@ -37,7 +38,7 @@ void AddForcedURLOnUIThread(scoped_refptr<history::TopSites> top_sites,
                             const GURL& url) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
-  if (top_sites.get() != NULL)
+  if (top_sites)
     top_sites->AddForcedURL(url, base::Time::Now());
 }
 
@@ -46,7 +47,7 @@ void AddForcedURLOnUIThread(scoped_refptr<history::TopSites> top_sites,
 namespace thumbnails {
 
 ThumbnailServiceImpl::ThumbnailServiceImpl(Profile* profile)
-    : top_sites_(profile->GetTopSites()),
+    : top_sites_(TopSitesFactory::GetForProfile(profile).get()),

[Bernhard Bauer, 2015/01/08 10:22:05]

Remove the .get().

[Jitu( very slow this week), 2015/01/12 11:30:08]

Done.

       use_thumbnail_retargeting_(IsThumbnailRetargetingEnabled()) {
 }