Adds plumbing to pass WebUI mojo::Handle from browser to renderer

content/common/mojo/render_process.mojom

Index: content/common/mojo/render_process.mojom
diff --git a/content/common/mojo/render_process.mojom b/content/common/mojo/render_process.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..1ad9e55990318fc17cf1a62af802031973b36bbd
--- /dev/null
+++ b/content/common/mojo/render_process.mojom
@@ -0,0 +1,17 @@
+// 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.
+
+module content {
+
+[Peer=RenderProcessMojo]
+interface RenderProcessHostMojo {
+};
+
+[Peer=RenderProcessHostMojo]
+interface RenderProcessMojo {
+  SetWebUIHandle(int32 view_routing_id,
+                 handle<message_pipe> browser_web_ui_handle);
+};
+
+}