add 'r'epeat option sans the HUD (to not complicate the profile)

Change-Id: Ia95f2b2b86c83b1715dc46b07baa2fc547abdee3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/229081
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: Mike Reed <reed@google.com>
diff --git a/tools/viewer/Viewer.cpp b/tools/viewer/Viewer.cpp
index fe116a9..ef26b8d 100644
--- a/tools/viewer/Viewer.cpp
+++ b/tools/viewer/Viewer.cpp
@@ -349,6 +349,10 @@
         this->updateTitle();
         fWindow->inval();
     });
+    fCommands.addCommand('r', "Redraw", "Toggle redraw", [this]() {
+        fRefresh = !fRefresh;
+        fWindow->inval();
+    });
     fCommands.addCommand('s', "Overlays", "Toggle stats display", [this]() {
         fStatsLayer.setActive(!fStatsLayer.getActive());
         fWindow->inval();