linux_aura: Three fixes for switching themes.

chrome/browser/themes/theme_service_aurax11.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_SERVICE_AURAX11_H_
+#define CHROME_BROWSER_THEMES_THEME_SERVICE_AURAX11_H_
+
+#include "base/prefs/pref_change_registrar.h"
+#include "chrome/browser/themes/theme_service.h"
+
+// A subclass of ThemeService that queries the current ui::LinuxUI instance for
+// theme data.
+class ThemeServiceAuraX11 : public ThemeService {
+ public:
+  ThemeServiceAuraX11();
+  virtual ~ThemeServiceAuraX11();
+
+  // Overridden from ui::ThemeProvider:
+  virtual SkColor GetColor(int id) const OVERRIDE;
+  virtual bool HasCustomImage(int id) const OVERRIDE;
+
+  // Overridden from ThemeService:
+  virtual void Init(Profile* profile) OVERRIDE;
+  virtual gfx::Image GetImageNamed(int id) const OVERRIDE;
+  virtual void SetTheme(const extensions::Extension* extension) OVERRIDE;
+  virtual void UseDefaultTheme() OVERRIDE;
+  virtual void SetNativeTheme() OVERRIDE;
+  virtual bool UsingDefaultTheme() const OVERRIDE;
+  virtual bool UsingNativeTheme() const OVERRIDE;
+
+ private:
+  void OnUsesSystemThemeChanged();
+
+  // Whether we'll give the ui::LinuxUI object first shot at providing theme
+  // resources.
+  bool use_system_theme_;
+
+  PrefChangeRegistrar registrar_;
+
+  DISALLOW_COPY_AND_ASSIGN(ThemeServiceAuraX11);
+};
+
+#endif  // CHROME_BROWSER_THEMES_THEME_SERVICE_AURAX11_H_