cc: Move SkShader construction to a single spot in PaintShader

ui/gfx/render_text.h

 // 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.
 
 #ifndef UI_GFX_RENDER_TEXT_H_
 #define UI_GFX_RENDER_TEXT_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 19 matching lines @@
 #include "ui/gfx/geometry/size_f.h"
 #include "ui/gfx/geometry/vector2d.h"
 #include "ui/gfx/range/range.h"
 #include "ui/gfx/range/range_f.h"
 #include "ui/gfx/selection_model.h"
 #include "ui/gfx/shadow_value.h"
 #include "ui/gfx/text_constants.h"
 
 class SkDrawLooper;
 struct SkPoint;
-class SkShader;
 class SkTypeface;
 
 namespace gfx {
 namespace test {
 class RenderTextTestApi;
 }
 
 class Canvas;
 struct DecoratedText;
 class Font;
 
 namespace internal {
 
 // Internal helper class used by derived classes to draw text through Skia.
 class GFX_EXPORT SkiaTextRenderer {
  public:
   explicit SkiaTextRenderer(Canvas* canvas);
   virtual ~SkiaTextRenderer();
 
   void SetDrawLooper(sk_sp<SkDrawLooper> draw_looper);
   void SetFontRenderParams(const FontRenderParams& params,
                            bool subpixel_rendering_suppressed);
   void SetTypeface(sk_sp<SkTypeface> typeface);
   void SetTextSize(SkScalar size);
   void SetForegroundColor(SkColor foreground);
-  void SetShader(sk_sp<SkShader> shader);
+  void SetShader(std::unique_ptr<cc::PaintShader> shader);
   // Sets underline metrics to use if the text will be drawn with an underline.
   // If not set, default values based on the size of the text will be used. The
   // two metrics must be set together.
   void SetUnderlineMetrics(SkScalar thickness, SkScalar position);
   void DrawSelection(const std::vector<Rect>& selection, SkColor color);
   virtual void DrawPosText(const SkPoint* pos,
                            const uint16_t* glyphs,
                            size_t glyph_count);
   // Draw underline and strike-through text decorations.
   // Based on |SkCanvas::DrawTextDecorations()| and constants from:
@@ skipping 780 matching lines @@
   // Lines computed by EnsureLayout. These should be invalidated upon
   // OnLayoutTextAttributeChanged and OnDisplayTextAttributeChanged calls.
   std::vector<internal::Line> lines_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderText);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_RENDER_TEXT_H_