Revert of Revert of make gm background colors 565 compatible

gm/gradientDirtyLaundry.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 "SkGradientShader.h"
 
@@ skipping 48 matching lines @@
 
 static const GradMaker gGradMakers[] = {
     MakeLinear, MakeRadial, MakeSweep,
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 class GradientsGM : public GM {
 public:
     GradientsGM() {
-        this->setBGColor(0xFFDDDDDD);
+        this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
     }
 
 protected:
     SkString onShortName() override { return SkString("gradient_dirty_laundry"); }
     SkISize onISize() override { return SkISize::Make(640, 615); }
 
     void onDraw(SkCanvas* canvas) override {
         SkPoint pts[2] = { { 0, 0 },
                            { SkIntToScalar(100), SkIntToScalar(100) }
         };
@@ skipping 17 matching lines @@
     }
 
 private:
     typedef GM INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new GradientsGM; }
 static GMRegistry reg(MyFactory);