GTK: Activate window when "Get themes" button is clicked.

chrome/browser/views/options/content_page_view.cc

Index: chrome/browser/views/options/content_page_view.cc
diff --git a/chrome/browser/views/options/content_page_view.cc b/chrome/browser/views/options/content_page_view.cc
index f5e99ff5431241ef023f13fd525b2951ad0830c7..fef0cbc280fa85e48ce740eccc3a1bc1c3778327 100644
--- a/chrome/browser/views/options/content_page_view.cc
+++ b/chrome/browser/views/options/content_page_view.cc
@@ -144,10 +144,7 @@ void ContentPageView::ButtonPressed(
 void ContentPageView::LinkActivated(views::Link* source, int event_flags) {
   if (source == themes_gallery_link_) {
     UserMetricsRecordAction(L"Options_ThemesGallery", profile()->GetPrefs());
-    Browser* browser = BrowserList::GetLastActive();
-    browser->OpenURL(GURL(l10n_util::GetString(IDS_THEMES_GALLERY_URL)),
-                     GURL(), NEW_FOREGROUND_TAB, PageTransition::LINK);
-    browser->window()->Activate();
+    BrowserList::GetLastActive()->OpenThemeGalleryTabAndActivate();
     return;
   }
   DCHECK_EQ(source, sync_action_link_);