Move WebUI ownership from the RenderFrameHostManager to the RenderFrameHost.

content/browser/frame_host/render_frame_host_delegate.cc

Index: content/browser/frame_host/render_frame_host_delegate.cc
diff --git a/content/browser/frame_host/render_frame_host_delegate.cc b/content/browser/frame_host/render_frame_host_delegate.cc
index 69b9e98da2a976c12d468a40f241a6fb90429e52..f33dc2c02d059c05c643fd2939482606b33fd53f 100644
--- a/content/browser/frame_host/render_frame_host_delegate.cc
+++ b/content/browser/frame_host/render_frame_host_delegate.cc
@@ -76,6 +76,11 @@ bool RenderFrameHostDelegate::ShouldRouteMessageEvent(
   return false;
 }
 
+scoped_ptr<WebUIImpl> RenderFrameHostDelegate::CreateWebUIForRenderFrameHost(
+    const GURL& url) {
+  return nullptr;
+}
+
 #if defined(OS_WIN)
 gfx::NativeViewAccessible
     RenderFrameHostDelegate::GetParentNativeViewAccessible() {