Reduce creation of ViewsDelegate

ash/test/ash_test_base.cc

Index: ash/test/ash_test_base.cc
diff --git a/ash/test/ash_test_base.cc b/ash/test/ash_test_base.cc
index 61fa2180a51568fbc6488f9f1dcd584f598532a9..cfd3142848f277ff8834ebaeb1e90082ec46ee30 100644
--- a/ash/test/ash_test_base.cc
+++ b/ash/test/ash_test_base.cc
@@ -19,7 +19,6 @@
 #include "ash/wm/coordinate_conversion.h"
 #include "ash/wm/window_positioner.h"
 #include "base/command_line.h"
-#include "content/public/test/web_contents_tester.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/screen_position_client.h"
 #include "ui/aura/client/window_tree_client.h"
@@ -81,13 +80,6 @@ class AshEventGeneratorDelegate : public aura::test::EventGeneratorDelegate {
 
 }  // namespace
 
-content::WebContents* AshTestViewsDelegate::CreateWebContents(
-    content::BrowserContext* browser_context,
-    content::SiteInstance* site_instance) {
-  return content::WebContentsTester::CreateTestWebContents(browser_context,
-                                                           site_instance);
-}
-
 /////////////////////////////////////////////////////////////////////////////
 
 AshTestBase::AshTestBase()