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

ui/views/controls/button/text_button.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/text_button.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "grit/ui_resources.h"
@@ skipping 735 matching lines @@
 
 void TextButton::set_ignore_minimum_size(bool ignore_minimum_size) {
   ignore_minimum_size_ = ignore_minimum_size;
 }
 
 std::string TextButton::GetClassName() const {
   return kViewClassName;
 }
 
 void TextButton::OnPaintFocusBorder(gfx::Canvas* canvas) {
-  if ((IsFocusable() || IsAccessibilityFocusableInRootView()) && HasFocus()) {
+  if ((focusable() || IsAccessibilityFocusableInRootView()) && HasFocus()) {
     gfx::Rect rect(GetLocalBounds());
     rect.Inset(kFocusRectInset, kFocusRectInset);
     canvas->DrawFocusRect(rect);
   }
 }
 
 gfx::NativeTheme::Part TextButton::GetThemePart() const {
   return gfx::NativeTheme::kPushButton;
 }
 
@@ skipping 67 matching lines @@
 gfx::Size NativeTextButton::GetMinimumSize() {
   return GetPreferredSize();
 }
 
 std::string NativeTextButton::GetClassName() const {
   return kViewClassName;
 }
 
 void NativeTextButton::OnPaintFocusBorder(gfx::Canvas* canvas) {
 #if defined(OS_WIN)
-  if ((IsFocusable() || IsAccessibilityFocusableInRootView()) && HasFocus()) {
+  if ((focusable() || IsAccessibilityFocusableInRootView()) && HasFocus()) {
     gfx::Rect rect(GetLocalBounds());
     rect.Inset(kFocusRectInset, kFocusRectInset);
     canvas->DrawFocusRect(rect);
   }
 #else
   TextButton::OnPaintFocusBorder(canvas);
 #endif
 }
 
 void NativeTextButton::GetExtraParams(
     gfx::NativeTheme::ExtraParams* params) const {
   TextButton::GetExtraParams(params);
   params->button.has_border = true;
 }
 
 }  // namespace views