Revert of make gm background colors 565 compatible

gm/gradients_2pt_conical.cpp

 /*
  * Copyright 2014 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 288 matching lines @@
     kOutside_GradCaseType,
     kInside_GradCaseType,
     kEdge_GradCaseType,
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 class ConicalGradientsGM : public GM {
 public:
     ConicalGradientsGM(GradCaseType gradCaseType) {
-        this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
+        this->setBGColor(0xFFDDDDDD);
         fName.printf("gradients_2pt_conical_%s", gGradCases[gradCaseType].fName);
         fGradCaseType = gradCaseType;
     }
 
 protected:
     SkString onShortName() {
         return fName;
     }
 
     virtual SkISize onISize() { return SkISize::Make(840, 815); }
@@ skipping 45 matching lines @@
 
 static GM* MyFactory1(void*) { return new ConicalGradientsGM(kInside_GradCaseType); }
 static GMRegistry reg1(MyFactory1);
 
 static GM* MyFactory2(void*) { return new ConicalGradientsGM(kOutside_GradCaseType); }
 static GMRegistry reg2(MyFactory2);
 
 static GM* MyFactory3(void*) { return new ConicalGradientsGM(kEdge_GradCaseType); }
 static GMRegistry reg3(MyFactory3);
 }