cc: Move SkShader construction to a single spot in PaintShader

cc/paint/BUILD.gn

 # Copyright 2017 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.
 
 import("//cc/cc.gni")
 
 cc_component("paint") {
   output_name = "cc_paint"
   sources = [
     "discardable_image_map.cc",
@@ skipping 11 matching lines @@
     "paint_flags.cc",
     "paint_flags.h",
     "paint_image.cc",
     "paint_image.h",
     "paint_op_buffer.cc",
     "paint_op_buffer.h",
     "paint_record.cc",
     "paint_record.h",
     "paint_recorder.cc",
     "paint_recorder.h",
+    "paint_shader.cc",
     "paint_shader.h",
     "record_paint_canvas.cc",
     "record_paint_canvas.h",
     "skia_paint_canvas.cc",
     "skia_paint_canvas.h",
   ]
 
   defines = [ "CC_PAINT_IMPLEMENTATION=1" ]
 
   # cc/paint is intended to be a separate component from cc that can be
   # included in Blink.  This component should never publicly include
   # anything that Blink core wouldn't include (e.g. base).
   public_deps = [
     "//cc/base",
     "//cc/debug",
     "//skia",
     "//ui/gfx:color_space",
     "//ui/gfx:geometry_skia",
     "//ui/gfx/geometry",
   ]
 
   deps = [
     "//base",
   ]
 }