create GrTestUtils.h, move some common functions into it

src/gpu/effects/GrConfigConversionEffect.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 "GrConfigConversionEffect.h"
 #include "GrContext.h"
 #include "GrInvariantOutput.h"
@@ skipping 124 matching lines @@
     bool swapRB;
     if (kNone_PMConversion == pmConv) {
         swapRB = true;
     } else {
         swapRB = random->nextBool();
     }
     return SkNEW_ARGS(GrConfigConversionEffect,
                                       (textures[GrProcessorUnitTest::kSkiaPMTextureIdx],
                                        swapRB,
                                        pmConv,
-                                       GrProcessorUnitTest::TestMatrix(random)));
+                                       GrTest::TestMatrix(random)));
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 void GrConfigConversionEffect::getGLProcessorKey(const GrGLCaps& caps,
                                                  GrProcessorKeyBuilder* b) const {
     GrGLConfigConversionEffect::GenKey(*this, caps, b);
 }
 
 GrGLFragmentProcessor* GrConfigConversionEffect::createGLInstance() const {
@@ skipping 133 matching lines @@
             kNone_PMConversion != pmConversion) {
             // The PM conversions assume colors are 0..255
             return NULL;
         }
         return SkNEW_ARGS(GrConfigConversionEffect, (texture,
                                                      swapRedAndBlue,
                                                      pmConversion,
                                                      matrix));
     }
 }