Cross-platform DefaultThemeProvider.

chrome/browser/ui/cocoa/themed_window.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/themed_window.h"
 
+#include "base/lazy_instance.h"
+#include "ui/base/default_theme_provider.h"
+
+namespace {
+
+// Whether to allow NSExceptions to be raised on the current thread.

[Robert Sesek, 2013/05/17 14:06:37]

?

[groby-ooo-7-16, 2013/05/17 23:52:57]

Overzealous copy/paste on a late night :(
On 2013/05/17 14:06:37, rsesek wrote:

+base::LazyInstance<ui::DefaultThemeProvider>::Leaky
+    g_defaultThemeProvider = LAZY_INSTANCE_INITIALIZER;
+
+}  // namespace
+
 // Default implementations; used mostly for tests so that the hosting windows
 // don't needs to know about the theming machinery.
 @implementation NSWindow (ThemeProvider)
 
 - (ThemeProvider*)themeProvider {
-  return NULL;
+  return &(g_defaultThemeProvider.Get());
 }
 
 - (ThemedWindowStyle)themedWindowStyle {
   return THEMED_NORMAL;
 }
 
 - (NSPoint)themePatternPhase {
   return NSZeroPoint;
 }
 
 @end