make tests portable by using 565 compatible colors

gm/skbug1719.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 "SkColorFilter.h"
 #include "SkBlurMaskFilter.h"
@@ skipping 16 matching lines @@
     SkString onShortName() override {
         return SkString("skbug1719");
     }
 
     SkISize onISize() override {
         return SkISize::Make(300, 100);
     }
 
     void onDrawBackground(SkCanvas* canvas) override {
         SkPaint bgPaint;
-        bgPaint.setColor(0xFF303030);
+        bgPaint.setColor(sk_tool_utils::color_to_565(0xFF303030));
         canvas->drawPaint(bgPaint);
     }
 
     void onDraw(SkCanvas* canvas) override {
         canvas->translate(SkIntToScalar(-800), SkIntToScalar(-650));
 
         // The data is lifted from an SKP that exhibited the bug.
 
         // This is a round rect.
         SkPath clipPath;
@@ skipping 45 matching lines @@
 private:
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new SkBug1719GM;)
 
 }