Revert of Revert of make gm background colors 565 compatible

gm/arcofzorro.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 "SkRandom.h"
 
 namespace skiagm {
 
 // This GM draws a lot of arcs in a 'Z' shape. It particularly exercises
 // the 'drawArc' code near a singularly of its processing (i.e., near the
 // edge of one of its underlying quads).
 class ArcOfZorroGM : public GM {
 public:
     ArcOfZorroGM() {
-        this->setBGColor(0xFFCCCCCC);
+        this->setBGColor(sk_tool_utils::color_to_565(0xFFCCCCCC));
     }
 
 protected:
 
     SkString onShortName() override {
         return SkString("arcofzorro");
     }
 
     SkISize onISize() override {
         return SkISize::Make(1000, 1000);
@@ skipping 45 matching lines @@
 
 private:
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return SkNEW(ArcOfZorroGM); )
 
 }