Omnibox Logging: Record Whether User Was on a Search Result Page

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 bb36c0b84970da7f1e842782234da5e07f4aac52..c31bdf8c3c2ac59c8a767a96a092ea095c891493 100644
--- a/chrome/common/metrics/proto/omnibox_event.proto
+++ b/chrome/common/metrics/proto/omnibox_event.proto
@@ -70,6 +70,10 @@ message OmniboxEventProto {
     // then we'll classify the web page into those categories, not HOMEPAGE.
     OTHER = 4;          // everything not included somewhere else on this list
     INSTANT_NEW_TAB_PAGE = 5;  // new tab page rendered by Instant
+    // 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;
   }
   optional PageClassification current_page_classification = 10;