Pass Physical Web metadata through a struct

ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.h

Index: ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.h
diff --git a/ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.h b/ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.h
index 20d0756be93f50d4f6b343177532f3fc542a4a93..2134b507bf22fd64c37718dc85f0d82a3318c71d 100644
--- a/ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.h
+++ b/ios/chrome/browser/physical_web/ios_chrome_physical_web_data_source.h
@@ -35,6 +35,10 @@ class IOSChromePhysicalWebDataSource
   // requests are disabled, the list will be empty.
   std::unique_ptr<base::ListValue> GetMetadata() override;
 
+  // Returns a list of resolved URLs and associated page metadata. If network
+  // requests are disabled, the list will be empty.
+  std::unique_ptr<MetadataList> GetMetadataList() override;

[mattreynolds, 2017/01/11 20:54:50]

MetadataList needs the physical_web:: namespace

[cco3, 2017/01/11 22:51:02]

Done.

+
   // Returns boolean |true| if network requests are disabled and there are one
   // or more discovered URLs that have not been sent to the resolution service.
   bool HasUnresolvedDiscoveries() override;