views: Convert IsEnabled() to just enabled() since it's just a simple accessor.

ui/views/controls/button/custom_button.cc

Index: ui/views/controls/button/custom_button.cc
diff --git a/ui/views/controls/button/custom_button.cc b/ui/views/controls/button/custom_button.cc
index 7eb75ef95e9fe66eebf27b43c6fa22a9fe7fce5a..d46ad121dd4c99b273a618a23bad1fc459e54470 100644
--- a/ui/views/controls/button/custom_button.cc
+++ b/ui/views/controls/button/custom_button.cc
@@ -94,19 +94,15 @@ bool CustomButton::IsHotTracked() const {
 }
 
 void CustomButton::OnEnabledChanged() {
-  if (View::IsEnabled() ? (state_ != BS_DISABLED) : (state_ == BS_DISABLED))
+  if (enabled() ? (state_ != BS_DISABLED) : (state_ == BS_DISABLED))
     return;
 
-  if (View::IsEnabled())
+  if (enabled())
     SetState(IsMouseHovered() ? BS_HOT : BS_NORMAL);
   else
     SetState(BS_DISABLED);
 }
 
-bool CustomButton::IsEnabled() const {
-  return state_ != BS_DISABLED;
-}
-
 std::string CustomButton::GetClassName() const {
   return kViewClassName;
 }
@@ -198,7 +194,7 @@ bool CustomButton::OnKeyReleased(const KeyEvent& event) {
 }
 
 bool CustomButton::AcceleratorPressed(const ui::Accelerator& accelerator) {
-  if (!View::IsEnabled())
+  if (!enabled())
     return false;
 
   SetState(BS_NORMAL);