Makes the maximize/restore button handling

ui/views/controls/button/image_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/image_button.h"
 
 #include "base/utf_string_conversions.h"
 #include "ui/base/animation/throb_animation.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/skbitmap_operations.h"
@@ skipping 13 matching lines @@
       preferred_size_(kDefaultWidth, kDefaultHeight) {
   // By default, we request that the gfx::Canvas passed to our View::OnPaint()
   // implementation is flipped horizontally so that the button's bitmaps are
   // mirrored when the UI directionality is right-to-left.
   EnableCanvasFlippingForRTLUI(true);
 }
 
 ImageButton::~ImageButton() {
 }
 
-void ImageButton::SetImage(ButtonState aState, const SkBitmap* anImage) {
-  images_[aState] = anImage ? *anImage : SkBitmap();
+void ImageButton::SetImage(ButtonState state, const SkBitmap* anImage) {
+  images_[state] = anImage ? *anImage : SkBitmap();
   PreferredSizeChanged();
 }
 
 void ImageButton::SetBackground(SkColor color,
                                 const SkBitmap* image,
                                 const SkBitmap* mask) {
   if (!image || !mask) {
     background_image_.reset();
     return;
   }
@@ skipping 119 matching lines @@
 bool ToggleImageButton::GetTooltipText(const gfx::Point& p,
                                        string16* tooltip) const {
   if (!toggled_ || toggled_tooltip_text_.empty())
     return Button::GetTooltipText(p, tooltip);
 
   *tooltip = toggled_tooltip_text_;
   return true;
 }
 
 }  // namespace views