Added const to image parameters for ImageButton class.

views/controls/button/image_button.cc

 // Copyright (c) 2010 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 "views/controls/button/image_button.h"
 
 #include "app/throb_animation.h"
 #include "gfx/canvas.h"
 #include "gfx/skbitmap_operations.h"
 
@@ skipping 11 matching lines @@
       v_alignment_(ALIGN_TOP) {
   // By default, we request that the gfx::Canvas passed to our View::Paint()
   // 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, SkBitmap* anImage) {
+void ImageButton::SetImage(ButtonState aState, const SkBitmap* anImage) {
   images_[aState] = anImage ? *anImage : SkBitmap();
 }
 
 void ImageButton::SetBackground(SkColor color,
-                                SkBitmap* image,
-                                SkBitmap* mask) {
+                                const SkBitmap* image,
+                                const SkBitmap* mask) {
   if (!image || !mask) {
     background_image_.reset();
     return;
   }
 
   background_image_ =
       SkBitmapOperations::CreateButtonBackground(color, *image, *mask);
 }
 
 void ImageButton::SetImageAlignment(HorizontalAlignment h_align,
@@ skipping 71 matching lines @@
 
   for (int i = 0; i < BS_COUNT; ++i) {
     SkBitmap temp = images_[i];
     images_[i] = alternate_images_[i];
     alternate_images_[i] = temp;
   }
   toggled_ = toggled;
   SchedulePaint();
 }
 
-void ToggleImageButton::SetToggledImage(ButtonState state, SkBitmap* image) {
+void ToggleImageButton::SetToggledImage(ButtonState state,
+                                        const SkBitmap* image) {
   if (toggled_) {
     images_[state] = image ? *image : SkBitmap();
     if (state_ == state)
       SchedulePaint();
   } else {
     alternate_images_[state] = image ? *image : SkBitmap();
   }
 }
 
 void ToggleImageButton::SetToggledTooltipText(const std::wstring& tooltip) {
   toggled_tooltip_text_.assign(tooltip);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // ToggleImageButton, ImageButton overrides:
 
-void ToggleImageButton::SetImage(ButtonState state, SkBitmap* image) {
+void ToggleImageButton::SetImage(ButtonState state, const SkBitmap* image) {
   if (toggled_) {
     alternate_images_[state] = image ? *image : SkBitmap();
   } else {
     images_[state] = image ? *image : SkBitmap();
     if (state_ == state)
       SchedulePaint();
   }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // ToggleImageButton, View overrides:
 
 bool ToggleImageButton::GetTooltipText(const gfx::Point& p,
                                        std::wstring* tooltip) {
   if (!toggled_ || toggled_tooltip_text_.empty())
     return Button::GetTooltipText(p, tooltip);
 
   *tooltip = toggled_tooltip_text_;
   return true;
 }
 
 }  // namespace views