Avoid creating a RenderWidgetHostView for proxies.

content/test/test_web_contents.h

Index: content/test/test_web_contents.h
diff --git a/content/test/test_web_contents.h b/content/test/test_web_contents.h
index c4c97bfa849edf67a1873f26ee6be4fff2295849..79c3d0fbddd72b7a2e4ef6d74c01c072a481ba73 100644
--- a/content/test/test_web_contents.h
+++ b/content/test/test_web_contents.h
@@ -72,8 +72,7 @@ class TestWebContents : public WebContentsImpl, public WebContentsTester {
       RenderViewHost* render_view_host,
       int opener_frame_routing_id,
       int proxy_routing_id,
-      const FrameReplicationState& replicated_frame_state,
-      bool for_main_frame) override;
+      const FrameReplicationState& replicated_frame_state) override;
   void UpdateRenderViewSizeForRenderManager() override {}
 
   // Returns a clone of this TestWebContents. The returned object is also a