Replicate LayoutTestRuntimeFlags across secondary window renderers.

content/shell/renderer/layout_test/layout_test_render_process_observer.cc

 // Copyright (c) 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/renderer/layout_test/layout_test_render_process_observer.h"
 
 #include "base/command_line.h"
 #include "components/test_runner/test_interfaces.h"
 #include "components/test_runner/web_test_interfaces.h"
 #include "components/test_runner/web_test_runner.h"
@@ skipping 66 matching lines @@
 
 void LayoutTestRenderProcessObserver::OnRenderProcessShutdown() {
   test_interfaces_.reset();
 }
 
 bool LayoutTestRenderProcessObserver::OnControlMessageReceived(
     const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(LayoutTestRenderProcessObserver, message)
     IPC_MESSAGE_HANDLER(ShellViewMsg_SetWebKitSourceDir, OnSetWebKitSourceDir)
+    IPC_MESSAGE_HANDLER(LayoutTestMsg_ReplicateLayoutTestRuntimeFlagsChanges,
+                        OnReplicateLayoutTestRuntimeFlagsChanges)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   return handled;
 }
 
 void LayoutTestRenderProcessObserver::OnSetWebKitSourceDir(
     const base::FilePath& webkit_source_dir) {
   webkit_source_dir_ = webkit_source_dir;
 }
 
+void LayoutTestRenderProcessObserver::OnReplicateLayoutTestRuntimeFlagsChanges(
+    const base::DictionaryValue& changed_layout_test_runtime_flags) {
+  test_interfaces()->TestRunner()->ReplicateLayoutTestRuntimeFlagsChanges(
+      changed_layout_test_runtime_flags);
+}
+
 }  // namespace content