Refactoring to make adding ink drop animations easier

chrome/browser/ui/views/bar_control_button.cc

Index: chrome/browser/ui/views/bar_control_button.cc
diff --git a/chrome/browser/ui/views/bar_control_button.cc b/chrome/browser/ui/views/bar_control_button.cc
index 0e4336d5533964aabfe476257ce75bcf48ac4f9f..3b915af5e6dbf9aca76e3e49672dc23f4e198210 100644
--- a/chrome/browser/ui/views/bar_control_button.cc
+++ b/chrome/browser/ui/views/bar_control_button.cc
@@ -66,8 +66,7 @@ void BarControlButton::OnNativeThemeChanged(const ui::NativeTheme* theme) {
 void BarControlButton::Layout() {
   ImageButton::Layout();
 
-  ink_drop_animation_controller_->SetInkDropCenter(
-      GetLocalBounds().CenterPoint());
+  ink_drop_animation_controller_->SetInkDropCenter(CalculateInkDropCenter());
 }
 
 void BarControlButton::AddInkDropLayer(ui::Layer* ink_drop_layer) {
@@ -83,6 +82,10 @@ void BarControlButton::RemoveInkDropLayer(ui::Layer* ink_drop_layer) {
   SetPaintToLayer(false);
 }
 
+gfx::Point BarControlButton::CalculateInkDropCenter() const {
+  return GetLocalBounds().CenterPoint();
+}
+
 bool BarControlButton::OnMousePressed(const ui::MouseEvent& event) {
   if (IsTriggerableEvent(event)) {
     ink_drop_animation_controller_->AnimateToState(