Add a Physical Web omnibox autocomplete provider

components/metrics/proto/omnibox_event.proto

Index: components/metrics/proto/omnibox_event.proto
diff --git a/components/metrics/proto/omnibox_event.proto b/components/metrics/proto/omnibox_event.proto
index 5d4f71996572cb7ab5846302be1f534db214e3b9..525dedb1005793582cfe6b613482946ace8baf68 100644
--- a/components/metrics/proto/omnibox_event.proto
+++ b/components/metrics/proto/omnibox_event.proto
@@ -168,6 +168,7 @@ message OmniboxEventProto {
     // a suggestion powered by a Chrome content provider.
     ON_DEVICE_CHROME = 13;
     CLIPBOARD_URL = 14;  // Suggestion coming from clipboard (iOS only).
+    PHYSICAL_WEB = 15;     // URLs broadcast by nearby devices (iOS only).

[Mark P, 2016/08/08 20:41:36]

URLs -> suggestions
(because this refers to the *provider* and I imagine the provider might want to
suggest other things at some point, e.g., if a broadcast URL looks like a search
query, it might display the search query as a suggestion)

[Mark P, 2016/08/08 20:41:36]

Also, before submitting this external changelist, please make the corresponding
change to the proto in the google internal codebase.

[mattreynolds, 2016/08/09 21:42:02]

Updated the comment, and thanks for the heads-up on the proto. Created
cl/129789244 for the internal change.

   }
 
   // The result set displayed on the completion popup
@@ -226,6 +227,7 @@ message OmniboxEventProto {
                                     // suggestions of any type.
       CALCULATOR              = 23; // A calculator answer.
       CLIPBOARD               = 24; // An URL based on the clipboard.
+      PHYSICAL_WEB            = 25; // A Physical Web nearby URL.
     }
     optional ResultType result_type = 2;