Replace IPC messages in layout_test_render_frame_observer.

content/shell/common/shell.mojom

Index: content/shell/common/shell.mojom
diff --git a/content/shell/common/shell.mojom b/content/shell/common/shell.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..fa9191d5551568868f4e38026536005997aab842
--- /dev/null
+++ b/content/shell/common/shell.mojom
@@ -0,0 +1,15 @@
+// Copyright 2016 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.
+
+module content.mojom;
+
+[Native]
+struct ShellTestConfig;
+
+interface ShellView {

[Sam McNally, 2017/01/19 05:41:35]

I think this should be named something like "LayoutTestControl".

[Jia, 2017/01/20 01:52:14]

Done.

+  LayoutDumpRequest();

[tibell, 2017/01/19 00:29:54]

Could you copy over the comments from the messages.h file here as documentation?

[Jia, 2017/01/20 01:52:14]

Done.

+  ReplicateTestConfiguration(ShellTestConfig config);
+  SetTestConfiguration(ShellTestConfig config);
+  SetupSecondaryRenderer();
+};