Enables hot-tracking for overflow extension buttons in the app menu

ui/native_theme/common_theme.cc

Index: ui/native_theme/common_theme.cc
diff --git a/ui/native_theme/common_theme.cc b/ui/native_theme/common_theme.cc
index 2c1dd9af988de3fa65de27555c1be98a2f432d9d..50dba800b87ff4840377132389951c9632db42eb 100644
--- a/ui/native_theme/common_theme.cc
+++ b/ui/native_theme/common_theme.cc
@@ -460,9 +460,11 @@ void CommonThemePaintMenuBackground(SkCanvas* canvas, const gfx::Rect& rect) {
   canvas->drawRect(gfx::RectToSkRect(rect), paint);
 }
 
-void CommonThemePaintMenuItemBackground(SkCanvas* canvas,
-                                        NativeTheme::State state,
-                                        const gfx::Rect& rect) {
+void CommonThemePaintMenuItemBackground(
+    SkCanvas* canvas,
+    NativeTheme::State state,
+    const gfx::Rect& rect,
+    const NativeTheme::MenuItemExtraParams& menu_item) {
   SkPaint paint;
   switch (state) {
     case NativeTheme::kNormal:
@@ -478,6 +480,11 @@ void CommonThemePaintMenuItemBackground(SkCanvas* canvas,
       NOTREACHED() << "Invalid state " << state;
       break;
   }
+  if (menu_item.corner_radius > 0) {
+    const SkScalar radius = SkIntToScalar(menu_item.corner_radius);
+    canvas->drawRoundRect(gfx::RectToSkRect(rect), radius, radius, paint);
+    return;
+  }
   canvas->drawRect(gfx::RectToSkRect(rect), paint);
 }