Don't clip tool bar border if active tab is invisible

Bug: 651022
Change-Id: I95d405ca9be1747abfe24f68f0837ed5981571ed
Reviewed-on: https://chromium-review.googlesource.com/958783Reviewed-by: Peter Kasting <pkasting@chromium.org>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Cr-Commit-Position: refs/heads/master@{#542556}

chrome/browser/ui/views/tabs/tab_strip.cc

@@ -1162,7 +1162,7 @@ void TabStrip::PaintChildren(const views::PaintInfo& paint_info) {
                              paint_info.paint_recording_scale_y(), nullptr);
 
   gfx::Canvas* canvas = recorder.canvas();
-  if (active_tab) {
+  if (active_tab && active_tab->visible()) {
     canvas->sk_canvas()->clipRect(
         gfx::RectToSkRect(active_tab->GetMirroredBounds()),
         SkClipOp::kDifference);