Revert of Revert of make gm background colors 565 compatible

gm/bigmatrix.cpp

 
 /*
  * Copyright 2012 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 "SkColorPriv.h"
 #include "SkShader.h"
 
 namespace skiagm {
 
 class BigMatrixGM : public GM {
 public:
     BigMatrixGM() {
-        this->setBGColor(0xFF66AA99);
+        this->setBGColor(sk_tool_utils::color_to_565(0xFF66AA99));
     }
 
 protected:
     virtual SkString onShortName() {
         return SkString("bigmatrix");
     }
 
     virtual SkISize onISize() {
         return SkISize::Make(50, 50);
     }
@@ skipping 57 matching lines @@
 private:
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory(void*) { return new BigMatrixGM; }
 static GMRegistry reg(MyFactory);
 
 }