cc: Move SkShader construction to a single spot in PaintShader

ui/gfx/render_text.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/gfx/render_text.h"
 
 #include <limits.h>
 
 #include <algorithm>
 #include <climits>
 
 #include "base/command_line.h"
 #include "base/i18n/break_iterator.h"
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
 #include "cc/paint/paint_canvas.h"
 #include "cc/paint/paint_shader.h"
 #include "third_party/icu/source/common/unicode/rbbi.h"
 #include "third_party/icu/source/common/unicode/utf16.h"
 #include "third_party/skia/include/core/SkDrawLooper.h"
@@ skipping 73 matching lines @@
     colors->push_back(c0);
   }
   positions->push_back(p0);
   colors->push_back(c0);
   positions->push_back(p1);
   colors->push_back(c1);
 }
 
 // Creates a SkShader to fade the text, with |left_part| specifying the left
 // fade effect, if any, and |right_part| specifying the right fade effect.
-sk_sp<SkShader> CreateFadeShader(const FontList& font_list,
-                                 const Rect& text_rect,
-                                 const Rect& left_part,
-                                 const Rect& right_part,
-                                 SkColor color) {
+std::unique_ptr<cc::PaintShader> CreateFadeShader(const FontList& font_list,
+                                                  const Rect& text_rect,
+                                                  const Rect& left_part,
+                                                  const Rect& right_part,
+                                                  SkColor color) {
   // The shader should only specify transparency of the fade itself, not the
   // original transparency, which will be applied by the actual renderer.
   DCHECK_EQ(SkColorGetA(color), static_cast<uint8_t>(0xff));
 
   // In general, fade down to 0 alpha.  But when the available width is less
   // than four characters, linearly ramp up the fade target alpha to as high as
   // 20% at zero width.  This allows the user to see the last faded characters a
   // little better when there are only a few characters shown.
   const float width_fraction =
       text_rect.width() / static_cast<float>(font_list.GetExpectedTextWidth(4));
@@ skipping 14 matching lines @@
   DCHECK(!positions.empty());
 
   // Terminate |positions| with 1.0, as required by Skia.
   if (positions.back() != 1.0) {
     positions.push_back(1.0);
     colors.push_back(colors.back());
   }
 
   const SkPoint points[2] = { PointToSkPoint(text_rect.origin()),
                               PointToSkPoint(text_rect.top_right()) };
-  return
-      SkGradientShader::MakeLinear(&points[0], &colors[0], &positions[0],
-                                   colors.size(), SkShader::kClamp_TileMode);
+  return cc::PaintShader::MakeLinearGradient(&points[0], &colors[0],
+                                             &positions[0], colors.size(),
+                                             SkShader::kClamp_TileMode);
 }
 
 // Converts a FontRenderParams::Hinting value to the corresponding
 // cc::PaintFlags::Hinting value.
 cc::PaintFlags::Hinting FontRenderParamsHintingToPaintFlagsHinting(
     FontRenderParams::Hinting params_hinting) {
   switch (params_hinting) {
     case FontRenderParams::HINTING_NONE:
       return cc::PaintFlags::kNo_Hinting;
     case FontRenderParams::HINTING_SLIGHT:
@@ skipping 64 matching lines @@
 }
 
 void SkiaTextRenderer::SetTextSize(SkScalar size) {
   flags_.setTextSize(size);
 }
 
 void SkiaTextRenderer::SetForegroundColor(SkColor foreground) {
   flags_.setColor(foreground);
 }
 
-void SkiaTextRenderer::SetShader(sk_sp<SkShader> shader) {
-  flags_.setShader(cc::WrapSkShader(std::move(shader)));
+void SkiaTextRenderer::SetShader(std::unique_ptr<cc::PaintShader> shader) {
+  flags_.setShader(std::move(shader));
 }
 
 void SkiaTextRenderer::SetUnderlineMetrics(SkScalar thickness,
                                            SkScalar position) {
   underline_thickness_ = thickness;
   underline_position_ = position;
 }
 
 void SkiaTextRenderer::DrawPosText(const SkPoint* pos,
                                    const uint16_t* glyphs,
@@ skipping 1450 matching lines @@
 
   for (; range_max < length; ++range_max)
     if (iter.IsEndOfWord(range_max) || iter.IsStartOfWord(range_max))
       break;
 
   return range.is_reversed() ? Range(range_max, range_min)
                              : Range(range_min, range_max);
 }
 
 }  // namespace gfx