Change chrome:// favicons in tabstrip based on theming.

chrome/browser/ui/libgtk2ui/gtk2_ui.cc

 // Copyright (c) 2012 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 "chrome/browser/ui/libgtk2ui/gtk2_ui.h"
 
 #include <math.h>
 #include <pango/pango.h>
 #include <set>
 #include <utility>
@@ skipping 539 matching lines @@
     if (!bitmap.empty())
       image = gfx::Image::CreateFrom1xBitmap(bitmap);
   }
 
   gtk_images_[id] = image;
   return image;
 }
 
 bool Gtk2UI::GetTint(int id, color_utils::HSL* tint) const {
   switch (id) {
+    // Tints for which the cross-platform default is fine. Before adding new
+    // values here, specifically verify they work well on Linux.
     case ThemeProperties::TINT_BACKGROUND_TAB:
-      // Tints for which the cross-platform default is fine. Before adding new
-      // values here, specifically verify they work well on Linux.
+    // TODO(estade): Return something useful for TINT_BUTTONS so that chrome://
+    // page icons are colored appropriately.
+    case ThemeProperties::TINT_BUTTONS:
       break;
     default:
       // Assume any tints not specifically verified on Linux aren't usable.
       // TODO(pkasting): Try to remove values from |colors_| that could just be
       // added to the group above instead.
       NOTREACHED();
   }
   return false;
 }
 
@@ skipping 835 matching lines @@
   // Blacklist scaling factors <130% (crbug.com/484400) and round
   // to 1 decimal to prevent rendering problems (crbug.com/485183).
   return scale < 1.3f ? 1.0f : roundf(scale * 10) / 10;
 }
 
 }  // namespace libgtk2ui
 
 views::LinuxUI* BuildGtk2UI() {
   return new libgtk2ui::Gtk2UI;
 }