Service CreateNewWindow on the UI thread with a new mojo interface

content/test/test_render_frame.h

Index: content/test/test_render_frame.h
diff --git a/content/test/test_render_frame.h b/content/test/test_render_frame.h
index c200b1ad49c6981c0567a58d0b105ec130fc536f..448ac9331cc3c50d7467783292c7df9e524dce8d 100644
--- a/content/test/test_render_frame.h
+++ b/content/test/test_render_frame.h
@@ -5,8 +5,12 @@
 #ifndef CONTENT_TEST_TEST_RENDER_FRAME_H_
 #define CONTENT_TEST_TEST_RENDER_FRAME_H_
 
+#include <memory>
+
 #include "base/macros.h"
+#include "content/common/frame.mojom.h"
 #include "content/renderer/render_frame_impl.h"
+#include "mojo/public/cpp/bindings/scoped_interface_endpoint_handle.h"
 
 namespace blink {
 class WebHistoryItem;
@@ -15,6 +19,7 @@ class WebHistoryItem;
 namespace content {
 
 struct CommonNavigationParams;
+class MockFrameHost;
 struct RequestNavigationParams;
 struct StartNavigationParams;
 
@@ -49,8 +54,14 @@ class TestRenderFrame : public RenderFrameImpl {
   blink::WebNavigationPolicy DecidePolicyForNavigation(
       const blink::WebFrameClient::NavigationPolicyInfo& info) override;
 
+  mojom::FrameHostAssociatedPtr GetFrameHost() override;
+
  private:
+  void BindFrameHost(mojo::ScopedInterfaceEndpointHandle handle);
   explicit TestRenderFrame(const RenderFrameImpl::CreateParams& params);
+
+  std::unique_ptr<MockFrameHost> mock_frame_host_;
+
   DISALLOW_COPY_AND_ASSIGN(TestRenderFrame);
 };