Ensure that the focus ring in the bookmarks bar does not paint outside the parent view.

ui/views/controls/focus_ring.cc

Index: ui/views/controls/focus_ring.cc
diff --git a/ui/views/controls/focus_ring.cc b/ui/views/controls/focus_ring.cc
index b905823817e7bdb568f0a5be6395b953226dec06..70400b8e0c3794247670ad3d1e9ffeb0304e5950 100644
--- a/ui/views/controls/focus_ring.cc
+++ b/ui/views/controls/focus_ring.cc
@@ -40,6 +40,9 @@ views::View* FocusRing::Install(views::View* parent,
   if (!ring) {
     ring = new FocusRing();
     parent->AddChildView(ring);
+    // A layer is necessary to paint beyond the parent's bounds.
+    ring->SetPaintToLayer();
+    ring->layer()->SetFillsBoundsOpaquely(false);
   }
   ring->override_color_id_ = override_color_id;
   ring->Layout();
@@ -86,9 +89,6 @@ void FocusRing::OnPaint(gfx::Canvas* canvas) {
 
 FocusRing::FocusRing()
     : override_color_id_(ui::NativeTheme::kColorId_NumColors) {
-  // A layer is necessary to paint beyond the parent's bounds.
-  SetPaintToLayer();

[ananta, 2017/04/12 23:54:04]

Moved this code to FocusRing::Install() as we need the parent to be setup on the
view for the ChildLayerAdded() notification to be propagated up the parent
chain.

-  layer()->SetFillsBoundsOpaquely(false);
 }
 
 FocusRing::~FocusRing() {}