ntp: use web store as default mv tile instead of themes gallery

chrome/browser/ui/webui/ntp/most_visited_handler.cc

Index: chrome/browser/ui/webui/ntp/most_visited_handler.cc
diff --git a/chrome/browser/ui/webui/ntp/most_visited_handler.cc b/chrome/browser/ui/webui/ntp/most_visited_handler.cc
index 73a1363ae3a93a056506964a176dab6d21a687d7..25e07843f2293ea873edb4b40c245bdfa91520e0 100644
--- a/chrome/browser/ui/webui/ntp/most_visited_handler.cc
+++ b/chrome/browser/ui/webui/ntp/most_visited_handler.cc
@@ -291,9 +291,9 @@ void MostVisitedHandler::SetPagesValueFromTopSites(
           "chrome://theme/IDR_NEWTAB_CHROME_WELCOME_PAGE_THUMBNAIL");
       page_value->SetString("faviconDominantColor", "rgb(0, 147, 60)");
     } else if (url.url.spec() ==
-               l10n_util::GetStringUTF8(IDS_THEMES_GALLERY_URL)) {
+               l10n_util::GetStringUTF8(IDS_WEBSTORE_URL)) {
       page_value->SetString("thumbnailUrl",
-          "chrome://theme/IDR_NEWTAB_THEMES_GALLERY_THUMBNAIL");
+          "chrome://theme/IDR_NEWTAB_WEBSTORE_THUMBNAIL");
       page_value->SetString("faviconDominantColor", "rgb(63, 132, 197)");
     }