PlzNavigate: Support data urls

content/renderer/render_frame_impl.h

Index: content/renderer/render_frame_impl.h
diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h
index 938c9e41e1c94dfe3f37a6130ece7a4de28f5387..eae81b225056b5a270e235cc313fb3ab90387ef2 100644
--- a/content/renderer/render_frame_impl.h
+++ b/content/renderer/render_frame_impl.h
@@ -706,8 +706,13 @@ class CONTENT_EXPORT RenderFrameImpl
 
   // PlzNavigate
   // Sends a FrameHostMsg_BeginNavigation to the browser based on the contents
-  // of the WebURLRequest.
-  void BeginNavigation(blink::WebURLRequest* request);
+  // of the WebURLRequest. Returns whether a network request should be made for
+  // the navigation.
+  bool BeginNavigation(blink::WebURLRequest* request);
+
+  // Loads a data url.
+  void LoadDataURL(const CommonNavigationParams& params,
+                   blink::WebFrame* frame);
 
   // Returns the URL being loaded by the |frame_|'s request.
   GURL GetLoadingUrl() const;