views: Convert IsFocusable() to just focusable() since it's just a simple accessor.

ui/views/controls/button/checkbox.cc

 // Copyright (c) 2011 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/checkbox.h"
 
 #include "base/logging.h"
 #include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/gfx/canvas.h"
 #include "ui/views/controls/label.h"
@@ skipping 43 matching lines @@
   return kViewClassName;
 }
 
 void Checkbox::GetAccessibleState(ui::AccessibleViewState* state) {
   TextButtonBase::GetAccessibleState(state);
   state->role = ui::AccessibilityTypes::ROLE_CHECKBUTTON;
   state->state = checked() ? ui::AccessibilityTypes::STATE_CHECKED : 0;
 }
 
 void Checkbox::OnPaintFocusBorder(gfx::Canvas* canvas) {
-  if (HasFocus() && (IsFocusable() || IsAccessibilityFocusableInRootView())) {
+  if (HasFocus() && (focusable() || IsAccessibilityFocusableInRootView())) {
     gfx::Rect bounds(GetTextBounds());
     // Increate the bounding box by one on each side so that that focus border
     // does not draw on top of the letters.
     bounds.Inset(-1, -1, -1, -1);
     canvas->DrawFocusRect(bounds);
   }
 }
 
 void Checkbox::NotifyClick(const views::Event& event) {
   SetChecked(!checked());
@@ skipping 28 matching lines @@
   gfx::NativeTheme::ExtraParams extra;
   gfx::NativeTheme::State state = GetThemeState(&extra);
   gfx::Size size(gfx::NativeTheme::instance()->GetPartSize(GetThemePart(),
                                                            state,
                                                            extra));
   bounds.Offset(size.width() + kCheckboxLabelSpacing, 0);
   return bounds;
 }
 
 }  // namespace views