Run SchedulePaint for v1 app frames on enter/exit overview-mode

The v1 app frames change its visibility on overview mode, therefore
the SchedulePaint() should be called. Normal browser windows
don't have to.

Bug: 949227, 951405
Test: manually
Change-Id: If448b1d0eb016dfad2522545e3e62f102ed1f9da
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1562073Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Jun Mukai <mukai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#649686}

chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc

@@ -763,6 +763,14 @@ void BrowserNonClientFrameViewAsh::OnOverviewOrSplitviewModeChanged() {
   caption_button_container_->SetVisible(should_show_caption_buttons);
   if (hosted_app_button_container())
     hosted_app_button_container()->SetVisible(should_show_caption_buttons);
+
+  // The entire frame should be repainted for v1 apps, since its visibility can
+  // change (see also ShouldPaint()). Do not invoke this on normal browser
+  // windows since it does not have to repaint frame except for the caption
+  // buttons and repainting might cause stuttering of the animation. See
+  // https://crbug.com/949227.
+  if (!browser_view()->IsBrowserTypeNormal())
+    SchedulePaint();
 }
 
 std::unique_ptr<ash::FrameHeader>