Revert of Revert of make gm background colors 565 compatible

gm/colormatrix.cpp

 /*
  * Copyright 2011 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 "SkColorMatrixFilter.h"
 #include "SkGradientShader.h"
@@ skipping 31 matching lines @@
     SkDoOnce fOnce;
     void init() {
         if (fOnce.once()) {
             fSolidBitmap = this->createSolidBitmap(64, 64);
             fTransparentBitmap = this->createTransparentBitmap(64, 64);
         }
     }
 
 public:
     ColorMatrixGM() {
-        this->setBGColor(0xFF808080);
+        this->setBGColor(sk_tool_utils::color_to_565(0xFF808080));
     }
 
 protected:
     virtual SkString onShortName() {
         return SkString("colormatrix");
     }
 
     virtual SkISize onISize() {
         return SkISize::Make(WIDTH, HEIGHT);
     }
@@ skipping 102 matching lines @@
     SkBitmap fTransparentBitmap;
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new ColorMatrixGM; }
 static GMRegistry reg(MyFactory);
 
 }