Pass a ui::PaintContext from ui::Layer to layer delegates.

chrome/browser/chromeos/ui/accessibility_focus_ring_layer.cc

Index: chrome/browser/chromeos/ui/accessibility_focus_ring_layer.cc
diff --git a/chrome/browser/chromeos/ui/accessibility_focus_ring_layer.cc b/chrome/browser/chromeos/ui/accessibility_focus_ring_layer.cc
index 858c92f75d559cf0d9a965c059dbc44b719db445..504e86a6d0008b1ebe90ecad36fa57e08e42fe8f 100644
--- a/chrome/browser/chromeos/ui/accessibility_focus_ring_layer.cc
+++ b/chrome/browser/chromeos/ui/accessibility_focus_ring_layer.cc
@@ -9,6 +9,7 @@
 #include "base/bind.h"
 #include "ui/aura/window.h"
 #include "ui/compositor/layer.h"
+#include "ui/compositor/paint_context.h"
 #include "ui/gfx/canvas.h"
 
 namespace chromeos {
@@ -109,7 +110,8 @@ void AccessibilityFocusRingLayer::Set(const AccessibilityFocusRing& ring) {
   layer()->SetBounds(bounds);
 }
 
-void AccessibilityFocusRingLayer::OnPaintLayer(gfx::Canvas* canvas) {
+void AccessibilityFocusRingLayer::OnPaintLayer(
+    const ui::PaintContext& context) {
   gfx::Vector2d offset = layer()->bounds().OffsetFromOrigin();
 
   SkPaint paint;
@@ -117,6 +119,8 @@ void AccessibilityFocusRingLayer::OnPaintLayer(gfx::Canvas* canvas) {
   paint.setStyle(SkPaint::kStroke_Style);
   paint.setStrokeWidth(2);
 
+  gfx::Canvas* canvas = context.canvas();
+
   SkPath path;
   const int w = kGradientWidth;
   for (int i = 0; i < w; ++i) {