make pixelsnap textblob* etc gm portable

gm/bitmapshader.cpp

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "gm.h"
 
 #include "SkBitmap.h"
@@ skipping 26 matching lines @@
 
 static void adopt_shader(SkPaint* paint, SkShader* shader) {
     paint->setShader(shader);
     SkSafeUnref(shader);
 }
 
 class BitmapShaderGM : public GM {
 
 protected:
     void onOnceBeforeDraw() override {
-        this->setBGColor(SK_ColorGRAY);
+        this->setBGColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
         draw_bm(&fBitmap);
         draw_mask(&fMask);
     }
 
     SkString onShortName() override {
         return SkString("bitmapshaders");
     }
 
     SkISize onISize() override {
         return SkISize::Make(150, 100);
@@ skipping 51 matching lines @@
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new BitmapShaderGM; }
 static GMRegistry reg(MyFactory);
 
 }