Improving the appearance of overlay scrollbars

ui/views/controls/scrollbar/scroll_bar_views.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/scrollbar/scroll_bar_views.h"
 
 #include "base/logging.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/path.h"
@@ skipping 260 matching lines @@
   params_.scrollbar_track.track_x = bounds.x();
   params_.scrollbar_track.track_y = bounds.y();
   params_.scrollbar_track.track_width = bounds.width();
   params_.scrollbar_track.track_height = bounds.height();
   params_.scrollbar_track.classic_state = 0;
 
   GetNativeTheme()->Paint(canvas->sk_canvas(), part_, state_, bounds, params_);
 }
 
 gfx::Size ScrollBarViews::GetPreferredSize() const {
-  return gfx::Size(IsHorizontal() ? 0 : GetLayoutSize(),
-                   IsHorizontal() ? GetLayoutSize() : 0);
+  return gfx::Size(IsHorizontal() ? 0 : GetThickness(),
+                   IsHorizontal() ? GetThickness() : 0);
 }
 
 const char* ScrollBarViews::GetClassName() const {
   return kViewClassName;
 }
 
-int ScrollBarViews::GetLayoutSize() const {
+int ScrollBarViews::GetThickness() const {
   const ui::NativeTheme* theme = GetNativeTheme();
   return IsHorizontal() ? GetHorizontalScrollBarHeight(theme)
                         : GetVerticalScrollBarWidth(theme);
 }
 
 //////////////////////////////////////////////////////////////////////////////
 // BaseButton::ButtonListener overrides:
 
 void ScrollBarViews::ButtonPressed(Button* sender, const ui::Event& event) {
   if (sender == prev_button_) {
@@ skipping 35 matching lines @@
   ui::NativeTheme::ExtraParams thumb_params;
   thumb_params.scrollbar_thumb.is_hovering = false;
   gfx::Size track_size =
       theme->GetPartSize(ui::NativeTheme::kScrollbarHorizontalThumb,
                          ui::NativeTheme::kNormal, thumb_params);
 
   return std::max(track_size.height(), button_size.height());
 }
 
 }  // namespace views