use simpler gradient factories (in prep for removing SkUnitMapper param)

ui/views/controls/menu/menu_image_util.cc

 // Copyright (c) 2012 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/views/controls/menu/menu_image_util.h"
 
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "grit/ui_resources.h"
 #include "third_party/skia/include/effects/SkGradientShader.h"
@@ skipping 36 matching lines @@
 
     SkPoint gradient_points[3];
     gradient_points[0].iset(0, 0);
     gradient_points[1].iset(0,
                             static_cast<int>(kIndicatorSize * kGradientStop));
     gradient_points[2].iset(0, kIndicatorSize);
     SkColor gradient_colors[3] = { kGradient0, kGradient1, kGradient2 };
     skia::RefPtr<SkShader> shader = skia::AdoptRef(
         SkGradientShader::CreateLinear(
             gradient_points, gradient_colors, NULL, arraysize(gradient_points),
-            SkShader::kClamp_TileMode, NULL));
+            SkShader::kClamp_TileMode));
     SkPaint paint;
     paint.setStyle(SkPaint::kFill_Style);
     paint.setAntiAlias(true);
     paint.setShader(shader.get());
     int radius = kIndicatorSize / 2;
     canvas->sk_canvas()->drawCircle(radius, radius, radius, paint);
     paint.setStrokeWidth(SkIntToScalar(0));
     paint.setShader(NULL);
     paint.setStyle(SkPaint::kStroke_Style);
     paint.setColor(kBaseStroke);
     canvas->sk_canvas()->drawCircle(radius, radius, radius, paint);
 
     if (selected_) {
       SkPoint selected_gradient_points[2];
       selected_gradient_points[0].iset(0, 0);
       selected_gradient_points[1].iset(0, kSelectedIndicatorSize);
       SkColor selected_gradient_colors[2] = { kRadioButtonIndicatorGradient0,
                                               kRadioButtonIndicatorGradient1 };
       shader = skia::AdoptRef(
           SkGradientShader::CreateLinear(
               selected_gradient_points, selected_gradient_colors, NULL,
-              arraysize(selected_gradient_points),
-              SkShader::kClamp_TileMode, NULL));
+              arraysize(selected_gradient_points), SkShader::kClamp_TileMode));
       paint.setShader(shader.get());
       paint.setStyle(SkPaint::kFill_Style);
       canvas->sk_canvas()->drawCircle(radius, radius,
                                       kSelectedIndicatorSize / 2, paint);
 
       paint.setStrokeWidth(SkIntToScalar(0));
       paint.setShader(NULL);
       paint.setStyle(SkPaint::kStroke_Style);
       paint.setColor(kIndicatorStroke);
       canvas->sk_canvas()->drawCircle(radius, radius,
@@ skipping 70 matching lines @@
   int image_id = selected ? IDR_MENU_RADIO_SELECTED : IDR_MENU_RADIO_EMPTY;
   return ui::ResourceBundle::GetSharedInstance().GetImageNamed(image_id).
       AsImageSkia();
 }
 
 gfx::ImageSkia GetSubmenuArrowImage(bool dark_background) {
   return GetRtlSubmenuArrowImage(base::i18n::IsRTL(), dark_background);
 }
 
 }  // namespace views