Fix find-in-page "1 of 0" bug.

content/browser/find_request_manager.cc

Index: content/browser/find_request_manager.cc
diff --git a/content/browser/find_request_manager.cc b/content/browser/find_request_manager.cc
index 1936a5e381eed8f0faae7c97f31c94d1a31b2bb6..64e129726a3f76d371691e11537f00b3d975b40b 100644
--- a/content/browser/find_request_manager.cc
+++ b/content/browser/find_request_manager.cc
@@ -160,9 +160,13 @@ void FindRequestManager::OnFindReply(RenderFrameHost* rfh,
       number_of_matches_ += matches_delta;
       matches_per_frame_it->second = number_of_matches;
 
+      // All matches may have been removed since the last find reply.
+      if (rfh == active_frame_ && !number_of_matches)
+        relative_active_match_ordinal_ = 0;
+
       // The active match ordinal may need updating since the number of matches
       // before the active match may have changed.
-      if (rfh != active_frame_)
+      if (rfh != active_frame_ || !number_of_matches)
         UpdateActiveMatchOrdinal();
     }
   }