Store recording invalidations in DisplayListRecordingSource, save them via Update.

cc/test/fake_display_list_recording_source.h

Index: cc/test/fake_display_list_recording_source.h
diff --git a/cc/test/fake_display_list_recording_source.h b/cc/test/fake_display_list_recording_source.h
index 158c053771cbf87bce07893bf73b58142fa9d90c..28ea1ab7ab395007130ee717e3781e76a92cdf29 100644
--- a/cc/test/fake_display_list_recording_source.h
+++ b/cc/test/fake_display_list_recording_source.h
@@ -68,7 +68,8 @@ class FakeDisplayListRecordingSource : public DisplayListRecordingSource {
   }
 
   void Rerecord() {
-    Region invalidation = recorded_viewport_;
+    SetNeedsDisplayRect(recorded_viewport_);
+    Region invalidation;
     UpdateAndExpandInvalidation(&client_, &invalidation, size_,
                                 recorded_viewport_, 0, RECORD_NORMALLY);
   }