Switch SupportsUserData uses to use unique_ptr.

chrome/browser/history/chrome_history_backend_client.cc

Index: chrome/browser/history/chrome_history_backend_client.cc
diff --git a/chrome/browser/history/chrome_history_backend_client.cc b/chrome/browser/history/chrome_history_backend_client.cc
index 5630de205453dc9877773b359b44536cb7249940..8e7732c4716685acb059010d9145e64398eff9c8 100644
--- a/chrome/browser/history/chrome_history_backend_client.cc
+++ b/chrome/browser/history/chrome_history_backend_client.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/history/chrome_history_backend_client.h"
 
+#include "base/memory/ptr_util.h"
 #include "build/build_config.h"
 #include "chrome/common/channel_info.h"
 #include "components/bookmarks/browser/bookmark_model.h"
@@ -87,7 +88,7 @@ void ChromeHistoryBackendClient::OnHistoryBackendInitialized(
   if (thumbnail_database) {
     history_backend->SetUserData(
         history::AndroidProviderBackend::GetUserDataKey(),
-        new history::AndroidProviderBackend(
+        base::MakeUnique<history::AndroidProviderBackend>(
             history_dir.Append(kAndroidCacheFilename), history_database,
             thumbnail_database, this, history_backend));
   }