Cleanup GPU gamut transformation code

src/gpu/glsl/GrGLSLProgramDataManager.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "glsl/GrGLSLProgramDataManager.h"
 
 #include "SkMatrix.h"
+#include "SkMatrix44.h"
 
 void GrGLSLProgramDataManager::setSkMatrix(UniformHandle u, const SkMatrix& matrix) const {
     float mt[] = {
         matrix.get(SkMatrix::kMScaleX),
         matrix.get(SkMatrix::kMSkewY),
         matrix.get(SkMatrix::kMPersp0),
         matrix.get(SkMatrix::kMSkewX),
         matrix.get(SkMatrix::kMScaleY),
         matrix.get(SkMatrix::kMPersp1),
         matrix.get(SkMatrix::kMTransX),
         matrix.get(SkMatrix::kMTransY),
         matrix.get(SkMatrix::kMPersp2),
     };
     this->setMatrix3f(u, mt);
 }
+
+void GrGLSLProgramDataManager::setSkMatrix44(UniformHandle u, const SkMatrix44& matrix) const {
+    // TODO: We could skip this temporary buffer if we had direct access to the matrix storage
+    float m[16];
+    matrix.asColMajorf(m);
+    this->setMatrix4f(u, m);
+}