views: remove PlatformStyle::CreateLabelButtonBorder

ui/views/controls/button/label_button.cc

Index: ui/views/controls/button/label_button.cc
diff --git a/ui/views/controls/button/label_button.cc b/ui/views/controls/button/label_button.cc
index c883169c6c1c7e74f8aea4ea66f17171ab032beb..b37b6759bc4a7e2c508dd3a5d466e69efd54c40d 100644
--- a/ui/views/controls/button/label_button.cc
+++ b/ui/views/controls/button/label_button.cc
@@ -390,7 +390,14 @@ void LabelButton::EnableCanvasFlippingForRTLUI(bool flip) {
 }
 
 std::unique_ptr<LabelButtonBorder> LabelButton::CreateDefaultBorder() const {

[Evan Stade, 2016/09/22 22:21:10]

harmony should allow us to get rid of this completely (I think). As an
intermediate step this patch lgtm

-  return PlatformStyle::CreateLabelButtonBorder(style());
+  if (!ui::MaterialDesignController::IsModeMaterial() ||
+      style_ != Button::STYLE_TEXTBUTTON) {
+    return base::MakeUnique<LabelButtonAssetBorder>(style_);
+  }
+  std::unique_ptr<LabelButtonBorder> border(new views::LabelButtonBorder());

[sky, 2016/09/23 15:47:39]

MakeUnique?

+  border->set_insets(views::LabelButtonAssetBorder::GetDefaultInsetsForStyle(
+      style_));
+  return border;
 }
 
 void LabelButton::SetBorder(std::unique_ptr<Border> border) {