make pixelsnap textblob* etc gm portable

gm/transparency.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGradientShader.h"
 #include "SkSurface.h"
 #include "gm.h"
@@ skipping 45 matching lines @@
     SkPaint paint;
     paint.setShader(create_checkerboard_shader(c1, c2, size))->unref();
     canvas->drawPaint(paint);
 }
 
 /**
  *  This GM verifies that a transparent bitmap drawn over a
  *  checkerboard pattern looks correct.
  */
 DEF_SIMPLE_GM(transparency_check, canvas, 1792, 1080) {
-    checkerboard(canvas, 0xFF999999, 0xFF666666, 8);
+    checkerboard(canvas, sk_tool_utils::color_to_565(0xFF999999),
+            sk_tool_utils::color_to_565(0xFF666666), 8);
     {
         SkAutoCanvasRestore autoCanvasRestore(canvas, true);
         SkAutoTUnref<SkSurface> surface(SkSurface::NewRasterN32Premul(256, 9));
         make_transparency(surface->getCanvas(), 256.0f, 9.0f);
         canvas->scale(7.0f, 120.0f);
         surface->draw(canvas, 0, 0, NULL);
     }
 }