Slight code change to make some global variables const.

chrome/views/bitmap_scroll_bar.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef CHROME_VIEWS_BITMAP_SCROLL_BAR_H__
 #define CHROME_VIEWS_BITMAP_SCROLL_BAR_H__
 
 #include "chrome/views/button.h"
 #include "chrome/views/menu.h"
 #include "chrome/views/repeat_controller.h"
@@ skipping 27 matching lines @@
                         public Menu::Delegate {
  public:
   BitmapScrollBar(bool horizontal, bool show_scroll_buttons);
   virtual ~BitmapScrollBar() { }
 
   // Get the bounds of the "track" area that the thumb is free to slide within.
   gfx::Rect GetTrackBounds() const;
 
   // A list of parts that the user may supply bitmaps for.
   enum ScrollBarPart {
-    PREV_BUTTON = 0,    // The button used to represent scrolling up/left by 1 line.
-    NEXT_BUTTON,        // The button used to represent scrolling down/right by 1 line.
-                        // IMPORTANT: The code assumes the prev and next
-                        // buttons have equal width and equal height.
-    THUMB_START_CAP,    // The top/left segment of the thumb on the scrollbar.
-    THUMB_MIDDLE,       // The tiled background image of the thumb.
-    THUMB_END_CAP,      // The bottom/right segment of the thumb on the scrollbar.
-    THUMB_GRIPPY,       // The grippy that is rendered in the center of the thumb.
-    THUMB_TRACK,        // The tiled background image of the thumb track.
+    // The button used to represent scrolling up/left by 1 line.
+    PREV_BUTTON = 0,
+    // The button used to represent scrolling down/right by 1 line.
+    // IMPORTANT: The code assumes the prev and next
+    // buttons have equal width and equal height.
+    NEXT_BUTTON,
+    // The top/left segment of the thumb on the scrollbar.
+    THUMB_START_CAP,
+    // The tiled background image of the thumb.
+    THUMB_MIDDLE,
+    // The bottom/right segment of the thumb on the scrollbar.
+    THUMB_END_CAP,
+    // The grippy that is rendered in the center of the thumb.
+    THUMB_GRIPPY,
+    // The tiled background image of the thumb track.
+    THUMB_TRACK,
     PART_COUNT
   };
 
   // Sets the bitmap to be rendered for the specified part and state.
   void SetImage(ScrollBarPart part,
                 BaseButton::ButtonState state,
                 SkBitmap* bitmap);
 
   // An enumeration of different amounts of incremental scroll, representing
   // events sent from different parts of the UI/keyboard.
@@ skipping 110 matching lines @@
   // True if the scroll buttons at each end of the scroll bar should be shown.
   bool show_scroll_buttons_;
 
   DISALLOW_EVIL_CONSTRUCTORS(BitmapScrollBar);
 };
 
 }  // namespace views
 
 #endif  // #ifndef CHROME_VIEWS_BITMAP_SCROLL_BAR_H__