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

chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc

Index: chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc
diff --git a/chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc b/chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc
index 371e13dd271ee0adf8075c54a0d265eb9965ac5f..daea0ab0cf356781875b240261259a4e07395684 100644
--- a/chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc
+++ b/chrome/browser/ui/libgtk2ui/native_theme_gtk2.cc
@@ -199,7 +199,7 @@ void NativeThemeGtk2::PaintMenuItemBackground(
     SkCanvas* canvas,
     State state,
     const gfx::Rect& rect,
-    const MenuListExtraParams& menu_list) const {
+    const MenuItemExtraParams& menu_item) const {
   SkColor color;
   SkPaint paint;
   switch (state) {
@@ -217,6 +217,12 @@ void NativeThemeGtk2::PaintMenuItemBackground(
       NOTREACHED() << "Invalid state " << state;
       break;
   }
+  if (menu_item.corner_radius > 0) {
+    canvas->drawRoundRect(gfx::RectToSkRect(rect),
+                          SkIntToScalar(menu_item.corner_radius),
+                          SkIntToScalar(menu_item.corner_radius), paint);

[Peter Kasting, 2016/02/16 21:36:15]

Nit: Shorter:

    const SkScalar radius = SkIntToScalar(menu_item.corner_radius);
    canvas->drawRoundRect(gfx::RectToSkRect(rect), radius, radius, paint);

[varkha, 2016/02/17 17:52:00]

Done.

+    return;
+  }
   canvas->drawRect(gfx::RectToSkRect(rect), paint);
 }