Share a common alpha value used for displaying disabled state in Harmony

ui/views/controls/focusable_border.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/controls/focusable_border.h"
 
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/gfx/canvas.h"
@@ skipping 67 matching lines @@
   return gfx::Size();
 }
 
 void FocusableBorder::SetInsets(int top, int left, int bottom, int right) {
   insets_.Set(top, left, bottom, right);
 }
 
 SkColor FocusableBorder::GetCurrentColor(const View& view) const {
   if (!use_default_color_)
     return override_color_;
+
   SkColor color = view.GetNativeTheme()->GetSystemColor(
       view.HasFocus() ? ui::NativeTheme::kColorId_FocusedBorderColor :
                         ui::NativeTheme::kColorId_UnfocusedBorderColor);
-  if (ui::MaterialDesignController::IsSecondaryUiMaterial() && !view.enabled())
-    color = color_utils::BlendTowardOppositeLuma(color, 0x61);
+  if (ui::MaterialDesignController::IsSecondaryUiMaterial() &&
+      !view.enabled()) {
+    return color_utils::BlendTowardOppositeLuma(color,
+                                                gfx::kDisabledControlAlpha);
+  }
+
   return color;
 }
 
 }  // namespace views