[InstantExtended] Fixing how PageLoadSRP is emitted. Previously it was emitted only for Instant sea…

chrome/common/metrics/proto/omnibox_event.proto

Index: chrome/common/metrics/proto/omnibox_event.proto
diff --git a/chrome/common/metrics/proto/omnibox_event.proto b/chrome/common/metrics/proto/omnibox_event.proto
index c31bdf8c3c2ac59c8a767a96a092ea095c891493..89a3d6dad159a8c6a14cdda641623f2c98c8e36a 100644
--- a/chrome/common/metrics/proto/omnibox_event.proto
+++ b/chrome/common/metrics/proto/omnibox_event.proto
@@ -73,7 +73,10 @@ message OmniboxEventProto {
     // The user is on a search result page that's doing search term
     // replacement, meaning the search terms should've appeared in the omnibox
     // before the user started editing it, not the URL of the page.
-    SEARCH_RESULT_PAGE_DOING_SEARCH_TERM_REPLACEMENT = 6;
+    SEARCH_RESULT_PAGE_DOING_SEARCH_TERM_REPLACEMENT = 6;
+	// The user in a search result page that's not doing search term
+    // replacement, meaning the URL of the page shows in the omnibox.
+    SEARCH_RESULT_PAGE_NOT_DOING_SEARCH_TERM_REPLACEMENT = 7;
   }
   optional PageClassification current_page_classification = 10;