Enable builtin Mojo JS modules in layout tests

content/browser/frame_host/render_frame_host_manager_browsertest.cc

Index: content/browser/frame_host/render_frame_host_manager_browsertest.cc
diff --git a/content/browser/frame_host/render_frame_host_manager_browsertest.cc b/content/browser/frame_host/render_frame_host_manager_browsertest.cc
index af01878df6a79eb4ff08918d3cce0ffe380b0153..5a4b410a8dc86a3949d502698bc751e010813e43 100644
--- a/content/browser/frame_host/render_frame_host_manager_browsertest.cc
+++ b/content/browser/frame_host/render_frame_host_manager_browsertest.cc
@@ -1828,15 +1828,15 @@ IN_PROC_BROWSER_TEST_F(RenderFrameHostManagerTest, WebUIGetsBindings) {
       GetRenderManagerForTesting()->GetSwappedOutRenderViewHost(site_instance1);
   ASSERT_TRUE(initial_rvh);
   // The following condition is what was causing the bug.
-  EXPECT_EQ(0, initial_rvh->GetEnabledBindings());
+  EXPECT_FALSE(initial_rvh->GetEnabledBindings() & BINDINGS_POLICY_WEB_UI);
 
   // Navigate to url1 and check bindings.
   NavigateToURL(new_shell, url1);
   // The navigation should have used the first SiteInstance, otherwise
   // |initial_rvh| did not have a chance to be used.
   EXPECT_EQ(new_web_contents->GetSiteInstance(), site_instance1);
-  EXPECT_EQ(BINDINGS_POLICY_WEB_UI,
-      new_web_contents->GetRenderViewHost()->GetEnabledBindings());
+  EXPECT_TRUE(new_web_contents->GetRenderViewHost()
+      ->GetEnabledBindings() & BINDINGS_POLICY_WEB_UI);
 }
 
 // crbug.com/424526