Handle webuis when using the network service.

content/child/request_extra_data.h

Index: content/child/request_extra_data.h
diff --git a/content/child/request_extra_data.h b/content/child/request_extra_data.h
index 730af141d4f7489fce2013cdf3ad43fa364dfda4..214ba6ffdb24f9b11cf7ce4b05d49f7c7474f94f 100644
--- a/content/child/request_extra_data.h
+++ b/content/child/request_extra_data.h
@@ -12,6 +12,7 @@
 #include "content/child/web_url_loader_impl.h"
 #include "content/common/content_export.h"
 #include "content/common/navigation_params.h"
+#include "content/common/url_loader_factory.mojom.h"
 #include "third_party/WebKit/public/platform/WebPageVisibilityState.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebURLRequest.h"
@@ -167,6 +168,13 @@ class CONTENT_EXPORT RequestExtraData
     navigation_initiated_by_renderer_ = navigation_by_renderer;
   }
 
+  mojom::URLLoaderFactory* url_loader_factory_override() const {
+    return url_loader_factory_override_;
+  }
+  void set_url_loader_factory_override(mojom::URLLoaderFactory* factory) {
+    url_loader_factory_override_ = factory;
+  }
+
   void CopyToResourceRequest(ResourceRequest* request) const;
 
  private:
@@ -191,6 +199,7 @@ class CONTENT_EXPORT RequestExtraData
   bool download_to_network_cache_only_;
   bool block_mixed_plugin_content_;
   bool navigation_initiated_by_renderer_;
+  mojom::URLLoaderFactory* url_loader_factory_override_;
 
   DISALLOW_COPY_AND_ASSIGN(RequestExtraData);
 };