Sharpen MdTextButton border for fractional scale factors.

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 32 matching lines @@
 
 void FocusableBorder::Paint(const View& view, gfx::Canvas* canvas) {
   SkPaint paint;
   paint.setStyle(SkPaint::kStroke_Style);
   paint.setColor(GetCurrentColor(view));
 
   if (ui::MaterialDesignController::IsSecondaryUiMaterial()) {
     gfx::ScopedCanvas scoped(canvas);
     float dsf = canvas->UndoDeviceScaleFactor();
     // Scale the rect and snap to pixel boundaries.
-    gfx::RectF rect = gfx::RectF(gfx::ToEnclosedRect(
-        ScaleRect(gfx::RectF(view.GetLocalBounds()), dsf, dsf)));
+    gfx::RectF rect(gfx::ScaleToEnclosingRect(view.GetLocalBounds(), dsf));
     rect.Inset(gfx::InsetsF(0.5f));
     SkPath path;
     float corner_radius_px = kCornerRadiusDp * dsf;
     path.addRoundRect(gfx::RectFToSkRect(rect), corner_radius_px,
                       corner_radius_px);
     const int kStrokeWidthPx = 1;
     paint.setStrokeWidth(SkIntToScalar(kStrokeWidthPx));
     paint.setAntiAlias(true);
     canvas->DrawPath(path, paint);
   } else {
@@ skipping 19 matching lines @@
 
 SkColor FocusableBorder::GetCurrentColor(const View& view) const {
   if (!use_default_color_)
     return override_color_;
   return view.GetNativeTheme()->GetSystemColor(
       view.HasFocus() ? ui::NativeTheme::kColorId_FocusedBorderColor :
                         ui::NativeTheme::kColorId_UnfocusedBorderColor);
 }
 
 }  // namespace views