Move themes garbage-collection out of shutdown code.

chrome/browser/themes/browser_theme_provider.h

 // 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.
 
 #ifndef CHROME_BROWSER_THEMES_BROWSER_THEME_PROVIDER_H_
 #define CHROME_BROWSER_THEMES_BROWSER_THEME_PROVIDER_H_
 #pragma once
 
 #include <map>
 #include <set>
@@ skipping 187 matching lines @@
   // Returns the default color for the given color |id| COLOR_* enum value.
   static SkColor GetDefaultColor(int id);
 
   // Returns true and sets |result| to the requested default property, if |id|
   // is valid.
   static bool GetDefaultDisplayProperty(int id, int* result);
 
   // Returns the set of IDR_* resources that should be tinted.
   static const std::set<int>& GetTintableToolbarButtons();
 
+  // Remove preference values for themes that are no longer in use.
+  void RemoveUnusedThemes();
+
   // Save the images to be written to disk, mapping file path to id.
   typedef std::map<FilePath, int> ImagesDiskCache;
 
  protected:
   // Get the specified tint - |id| is one of the TINT_* enum values.
   color_utils::HSL GetTint(int id) const;
 
   // Clears all the override fields and saves the dictionary.
   virtual void ClearAllThemeData();
 
@@ skipping 22 matching lines @@
   // Saves the filename of the cached theme pack.
   void SavePackName(const FilePath& pack_path);
 
   // Save the id of the last theme installed.
   void SaveThemeID(const std::string& id);
 
   // Implementation of SetTheme() (and the fallback from LoadThemePrefs() in
   // case we don't have a theme pack).
   void BuildFromExtension(const Extension* extension);
 
-  // Remove preference values for themes that are no longer in use.
-  void RemoveUnusedThemes();
-
 #if defined(TOOLKIT_USES_GTK)
   // Loads an image and flips it horizontally if |rtl_enabled| is true.
   GdkPixbuf* GetPixbufImpl(int id, bool rtl_enabled) const;
 #endif
 
 #if defined(TOOLKIT_USES_GTK)
   typedef std::map<int, GdkPixbuf*> GdkPixbufMap;
   mutable GdkPixbufMap gdk_pixbufs_;
 #elif defined(OS_MACOSX)
   typedef std::map<int, NSImage*> NSImageMap;
@@ skipping 12 matching lines @@
 
   scoped_refptr<BrowserThemePack> theme_pack_;
 
   // The number of infobars currently displayed.
   int number_of_infobars_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserThemeProvider);
 };
 
 #endif  // CHROME_BROWSER_THEMES_BROWSER_THEME_PROVIDER_H_