Make COLOR_CONTROL_BACKGROUND customizable from a theme extension

chrome/browser/themes/theme_properties.h

 // Copyright (c) 2013 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_BROWSER_THEMES_THEME_PROPERTIES_H_
 #define CHROME_BROWSER_THEMES_THEME_PROPERTIES_H_
 
 #include <set>
 #include <string>
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/color_utils.h"
 
 // Static only class for querying which properties / images are themeable and
 // the defaults of these properties.
 // All methods are thread safe unless indicated otherwise.
 class ThemeProperties {
  public:
   // ---------------------------------------------------------------------------
   // The int values of OverwritableByUserThemeProperties, Alignment, and Tiling
   // are used as a key to store the property in the browser theme pack. If you
   // modify any of these enums, increment the version number in
   // browser_theme_pack.cc.
 
   enum OverwritableByUserThemeProperty {
+    COLOR_CONTROL_BACKGROUND,

[Peter Kasting, 2016/06/10 01:12:24]

If you touch the elements of this enum you need to modify the version number;
see the comment above

[Julien Isorce Samsung, 2016/06/10 09:51:37]

Done.

     COLOR_FRAME,
     COLOR_FRAME_INACTIVE,
     // Instead of using the INCOGNITO variants directly, most code should
     // use the original color ID in an incognito-aware context (such as
     // GetDefaultColor).
     COLOR_FRAME_INCOGNITO,
     COLOR_FRAME_INCOGNITO_INACTIVE,
     COLOR_TOOLBAR,
     COLOR_TAB_TEXT,
     COLOR_BACKGROUND_TAB_TEXT,
@@ skipping 37 matching lines @@
     REPEAT_Y = 2,
     REPEAT = 3
   };
 
   // --------------------------------------------------------------------------
   // The int value of the properties in NotOverwritableByUserThemeProperties
   // has no special meaning. Modify the enum to your heart's content.
   // The enum takes on values >= 1000 as not to overlap with
   // OverwritableByUserThemeProperties.
   enum NotOverwritableByUserThemeProperty {
-    COLOR_CONTROL_BACKGROUND = 1000,
-
     // The color of the line separating the bottom of the toolbar from the
     // contents.
-    COLOR_TOOLBAR_BOTTOM_SEPARATOR,
+    COLOR_TOOLBAR_BOTTOM_SEPARATOR = 1000,
 
     // The color of a normal toolbar button's icon.
     COLOR_TOOLBAR_BUTTON_ICON,
     // The color of a disabled toolbar button's icon.
     COLOR_TOOLBAR_BUTTON_ICON_INACTIVE,
 
     // The color of the line separating the top of the toolbar from the region
     // above. For a tabbed browser window, this is the line along the bottom
     // edge of the tabstrip, the stroke around the tabs, and the new tab button
     // stroke/shadow color.
@@ skipping 80 matching lines @@
 
   // Returns the default color for the given color |id| COLOR_* enum value.
   // Returns gfx::kPlaceholderColor if |id| is invalid.
   static SkColor GetDefaultColor(int id, bool otr);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ThemeProperties);
 };
 
 #endif  // CHROME_BROWSER_THEMES_THEME_PROPERTIES_H_