ui/gfx: Get rid of a few static variables from NativeTheme* type.

ui/gfx/native_theme_chromeos.cc

 // Copyright (c) 2011 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 "ui/gfx/native_theme_chromeos.h"
 
+#include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "grit/gfx_resources.h"
-#include "third_party/skia/include/effects/SkGradientShader.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkShader.h"
+#include "third_party/skia/include/effects/SkGradientShader.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/insets.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 #include "ui/gfx/skbitmap_operations.h"
 
 namespace {
 
 // Color constants. See theme_draw for details.
 
@@ skipping 200 matching lines @@
     };
 
     GetGradientPaintForRect(bounds,
         kGradientColors, kGradientPoints, arraysize(kGradientPoints),
         paint);
   }
 }
 
 }  // namespace
 
-/* static */
+base::LazyInstance<gfx::NativeThemeLinux> g_native_theme(
+    base::LINKER_INITIALIZED);
+
+// static
 const gfx::NativeThemeLinux* gfx::NativeThemeLinux::instance() {
-  // The global NativeThemeChromeos instance.
-  static NativeThemeChromeos s_native_theme;
-  return &s_native_theme;
+  return g_native_theme.Pointer();
 }
 
 NativeThemeChromeos::NativeThemeChromeos() {
 }
 
 NativeThemeChromeos::~NativeThemeChromeos() {
 }
 
 gfx::Size NativeThemeChromeos::GetPartSize(Part part,
                                            State state,
@@ skipping 462 matching lines @@
   SkPaint fill_paint;
   GetButtonGradientPaint(rect, state, &fill_paint);
   canvas->drawPath(border, fill_paint);
 
   if (stroke_border) {
     SkPaint stroke_paint;
     GetStrokePaint(state, &stroke_paint);
     canvas->drawPath(border, stroke_paint);
   }
 }