Service CreateNewWindow on the UI thread with a new mojo interface

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index b3ac9d9513a41317525fcd903218b69f21a6aa4d..e22f73c52522b1941a516ccc9434494e6819299a 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -257,6 +257,7 @@ uint32_t g_next_compositor_frame_sink_id = 1;
 // An implementation of mojom::RenderMessageFilter which can be mocked out
 // for tests which may indirectly send messages over this interface.
 mojom::RenderMessageFilter* g_render_message_filter_for_testing;
+mojom::RenderMessageFilterUI* g_render_message_filter_ui_for_testing;
 
 // Keep the global RenderThreadImpl in a TLS slot so it is impossible to access
 // incorrectly from the wrong thread.
@@ -538,11 +539,25 @@ mojom::RenderMessageFilter* RenderThreadImpl::current_render_message_filter() {
 }
 
 // static
+mojom::RenderMessageFilterUI*
+RenderThreadImpl::current_render_message_filter_ui() {
+  if (g_render_message_filter_ui_for_testing)
+    return g_render_message_filter_ui_for_testing;
+  DCHECK(current());
+  return current()->render_message_filter_ui();
+}
+
+// static
 void RenderThreadImpl::SetRenderMessageFilterForTesting(
     mojom::RenderMessageFilter* render_message_filter) {
   g_render_message_filter_for_testing = render_message_filter;
 }
 
+void RenderThreadImpl::SetRenderMessageFilterUIForTesting(
+    mojom::RenderMessageFilterUI* render_message_filter_ui) {
+  g_render_message_filter_ui_for_testing = render_message_filter_ui;
+}
+
 // In single-process mode used for debugging, we don't pass a renderer client
 // ID via command line because RenderThreadImpl lives in the same process as
 // the browser
@@ -2055,6 +2070,15 @@ mojom::RenderMessageFilter* RenderThreadImpl::render_message_filter() {
   return render_message_filter_.get();
 }
 
+mojom::RenderMessageFilterUI* RenderThreadImpl::render_message_filter_ui() {
+  if (!render_message_filter_ui_) {
+    GetChannel()->GetRemoteAssociatedInterface(&render_message_filter_ui_);
+  }
+
+  DCHECK(render_message_filter_ui_);
+  return render_message_filter_ui_.get();
+}
+
 gpu::GpuChannelHost* RenderThreadImpl::GetGpuChannel() {
   if (!gpu_channel_)
     return nullptr;