Explicitly initialize secondary renderers for layout tests.

content/shell/browser/layout_test/layout_test_devtools_frontend.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/shell/browser/layout_test/layout_test_devtools_frontend.h"
 
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/path_service.h"
@@ skipping 115 matching lines @@
   }
 
   ShellDevToolsFrontend::HandleMessageFromDevToolsFrontend(message);
 }
 
 void LayoutTestDevToolsFrontend::RenderProcessGone(
     base::TerminationStatus status) {
   BlinkTestController::Get()->DevToolsProcessCrashed();
 }
 
+void LayoutTestDevToolsFrontend::RenderFrameCreated(
+    RenderFrameHost* render_frame_host) {
+  BlinkTestController::Get()->HandleNewRenderFrameHost(render_frame_host);
+}
+
+void LayoutTestDevToolsFrontend::RenderFrameHostChanged(
+    RenderFrameHost* old_host,
+    RenderFrameHost* new_host) {
+  BlinkTestController::Get()->HandleNewRenderFrameHost(new_host);
+}
+
 }  // namespace content