Add metrics for omnibox Google searches that has no RLZ token for windows.

chrome/browser/search_engines/template_url.h

Index: chrome/browser/search_engines/template_url.h
diff --git a/chrome/browser/search_engines/template_url.h b/chrome/browser/search_engines/template_url.h
index 44cdeec971fe0732914d602c32f03b28889658b0..0947d3f92496714e7e49277ef5e1f324a3bbbdc9 100644
--- a/chrome/browser/search_engines/template_url.h
+++ b/chrome/browser/search_engines/template_url.h
@@ -132,6 +132,9 @@ class TemplateURLRef {
   static bool SameUrlRefs(const TemplateURLRef* ref1,
                           const TemplateURLRef* ref2);
 
+  // Collects metrics whether searches through Google are sent with RLZ string.
+  void CollectRLZMetrics() const;
+
  private:
   friend class SearchHostToURLsMapTest;
   friend class TemplateURL;