make pixelsnap textblob* etc gm portable

gm/transparency.cpp

Index: gm/transparency.cpp
diff --git a/gm/transparency.cpp b/gm/transparency.cpp
index 1a6275e2a22a249da8d31defe06cc2d9672d1ef2..62c277a691c7fedef6c2ebc29206e71571229846 100644
--- a/gm/transparency.cpp
+++ b/gm/transparency.cpp
@@ -63,7 +63,8 @@ static void checkerboard(SkCanvas* canvas, SkColor c1, SkColor c2, int size) {
  *  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));