cc: Move SkShader construction to a single spot in PaintShader

ui/gfx/render_text.h

Index: ui/gfx/render_text.h
diff --git a/ui/gfx/render_text.h b/ui/gfx/render_text.h
index 00fe00c8e734d7bfc0eebaf5bbaee6601c36ef8e..5353be69b8e2207a8e83cbd71824248ab96866e0 100644
--- a/ui/gfx/render_text.h
+++ b/ui/gfx/render_text.h
@@ -37,7 +37,6 @@
 
 class SkDrawLooper;
 struct SkPoint;
-class SkShader;
 class SkTypeface;
 
 namespace gfx {
@@ -63,7 +62,7 @@ class GFX_EXPORT SkiaTextRenderer {
   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.