Reduce views::Border creation verbosity by promoting factory functions

ui/views/controls/button/toggle_button.cc

 // Copyright 2016 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/button/toggle_button.h"
 
 #include "third_party/skia/include/core/SkDrawLooper.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "ui/accessibility/ax_node_data.h"
 #include "ui/gfx/canvas.h"
@@ skipping 89 matching lines @@
 // static
 const char ToggleButton::kViewClassName[] = "ToggleButton";
 
 ToggleButton::ToggleButton(ButtonListener* listener)
     : CustomButton(listener),
       is_on_(false),
       slide_animation_(this),
       thumb_view_(new ThumbView()) {
   slide_animation_.SetSlideDuration(80 /* ms */);
   slide_animation_.SetTweenType(gfx::Tween::LINEAR);
-  SetBorder(Border::CreateEmptyBorder(
+  SetBorder(CreateEmptyBorder(
       gfx::Insets(kTrackVerticalMargin, kTrackHorizontalMargin)));
   AddChildView(thumb_view_);
   SetInkDropMode(InkDropMode::ON);
   set_has_ink_drop_action_on_click(true);
 }
 
 ToggleButton::~ToggleButton() {
   // Destroying ink drop early allows ink drop layer to be properly removed,
   SetInkDropMode(InkDropMode::OFF);
 }
@@ skipping 116 matching lines @@
     // TODO(varkha, estade): The thumb is using its own view. Investigate if
     // repainting in every animation step to update colors could be avoided.
     UpdateThumb();
     SchedulePaint();
     return;
   }
   CustomButton::AnimationProgressed(animation);
 }
 
 }  // namespace views