Revert of make gm background colors 565 compatible

gm/nested.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"
 #include "SkRRect.h"
 
 namespace skiagm {
 
 // Test out various combinations of nested rects, ovals and rrects.
 class NestedGM : public GM {
 public:
     NestedGM(bool doAA, bool flipped) : fDoAA(doAA), fFlipped(flipped) {
-        this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
+        this->setBGColor(0xFFDDDDDD);
     }
 
 protected:
 
     SkString onShortName() override {
         SkString name("nested");
         if (fFlipped) {
             name.append("_flipY");
         }
         if (fDoAA) {
@@ skipping 103 matching lines @@
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return new NestedGM(/* doAA = */ true,  /* flipped = */ false); )
 DEF_GM( return new NestedGM(/* doAA = */ false, /* flipped = */ false); )
 DEF_GM( return new NestedGM(/* doAA = */ true,  /* flipped = */ true); )
 DEF_GM( return new NestedGM(/* doAA = */ false, /* flipped = */ true); )
 
 }