ash: Show better focus rects for the tray.

ui/views/controls/slider.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/slider.h"
 
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/stringprintf.h"
 #include "base/utf_string_conversions.h"
@@ skipping 12 matching lines @@
 }
 
 namespace views {
 
 Slider::Slider(SliderListener* listener, Orientation orientation)
     : listener_(listener),
       orientation_(orientation),
       value_(0.f),
       keyboard_increment_(0.1f),
       animating_value_(0.f),
-      value_is_valid_(false) {
+      value_is_valid_(false),
+      focus_color_(0) {
   EnableCanvasFlippingForRTLUI(true);
   set_focusable(true);
 }
 
 Slider::~Slider() {
 }
 
 void Slider::SetValue(float value) {
   SetValueInternal(value, VALUE_CHANGED_BY_API);
 }
@@ skipping 149 matching lines @@
   SchedulePaint();
 }
 
 void Slider::GetAccessibleState(ui::AccessibleViewState* state) {
   state->role = ui::AccessibilityTypes::ROLE_SLIDER;
   state->name = accessible_name_;
   state->value = UTF8ToUTF16(
       base::StringPrintf("%d%%", (int)(value_ * 100 + 0.5)));
 }
 
+void Slider::OnPaintFocusBorder(gfx::Canvas* canvas) {
+  if (!focus_color_) {
+    View::OnPaintFocusBorder(canvas);
+  } else if (HasFocus() && (focusable() || IsAccessibilityFocusable())) {
+    canvas->DrawRect(gfx::Rect(1, 1, width() - 3, height() - 3),
+                     focus_color_);
+  }
+}
+
 }  // namespace views