Fix for flaky MHTMLGenerationTest.ViewedMHTMLContainsNoStoreContentIfNoCacheControlPolicy test.

content/browser/download/mhtml_generation_browsertest.cc

Index: content/browser/download/mhtml_generation_browsertest.cc
diff --git a/content/browser/download/mhtml_generation_browsertest.cc b/content/browser/download/mhtml_generation_browsertest.cc
index 0dbc08b523a034ec014f02aebd3e3e7091b9ab64..0605115bccf62a4075a60d3dd2ceeeabe5cf8a0d 100644
--- a/content/browser/download/mhtml_generation_browsertest.cc
+++ b/content/browser/download/mhtml_generation_browsertest.cc
@@ -64,8 +64,10 @@ class FindTrackingDelegate : public WebContentsDelegate {
                  const gfx::Rect& selection_rect,
                  int active_match_ordinal,
                  bool final_update) override {
-    matches_ = number_of_matches;
-    run_loop_.Quit();
+    if (final_update) {
+      matches_ = number_of_matches;
+      run_loop_.Quit();
+    }
   }
 
   static int global_request_id;