Try 2: Completely redo how themes are stored on disk and processed at install time.

chrome/browser/gtk/download_shelf_gtk.cc

 // Copyright (c) 2009 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/gtk/download_shelf_gtk.h"
 
 #include "app/gfx/gtk_util.h"
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "chrome/browser/browser.h"
@@ skipping 183 matching lines @@
     gtk_widget_modify_bg(top_border_, GTK_STATE_NORMAL, &color);
 
     gtk_chrome_link_button_set_use_gtk_theme(
         GTK_CHROME_LINK_BUTTON(link_button_), theme_provider_->UseGtkTheme());
 
     // When using a non-standard, non-gtk theme, we make the link color match
     // the bookmark text color. Otherwise, standard link blue can look very
     // bad for some dark themes.
     bool use_default_color = theme_provider_->GetColor(
         BrowserThemeProvider::COLOR_BOOKMARK_TEXT) ==
-        BrowserThemeProvider::kDefaultColorBookmarkText;
+        BrowserThemeProvider::GetDefaultColor(
+            BrowserThemeProvider::COLOR_BOOKMARK_TEXT);
     GdkColor bookmark_color = theme_provider_->GetGdkColor(
         BrowserThemeProvider::COLOR_BOOKMARK_TEXT);
     gtk_chrome_link_button_set_normal_color(
         GTK_CHROME_LINK_BUTTON(link_button_),
         use_default_color ? NULL : &bookmark_color);
 
     ResourceBundle& rb = ResourceBundle::GetSharedInstance();
     close_button_->SetBackground(
         theme_provider_->GetColor(BrowserThemeProvider::COLOR_TAB_TEXT),
         rb.GetBitmapNamed(IDR_CLOSE_BAR),
@@ skipping 29 matching lines @@
 // static
 void DownloadShelfGtk::OnButtonClick(GtkWidget* button,
                                      DownloadShelfGtk* shelf) {
   if (button == shelf->close_button_->widget()) {
     shelf->Close();
   } else {
     // The link button was clicked.
     shelf->browser_->ShowDownloadsTab();
   }
 }