create GrTestUtils.h, move some common functions into it

src/effects/gradients/SkLinearGradient.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 "SkLinearGradient.h"
 
 static inline int repeat_bits(int x, const int bits) {
@@ skipping 526 matching lines @@
     SkScalar* stops = stopsArray;
     SkShader::TileMode tm;
     int colorCount = RandomGradientParams(random, colors, &stops, &tm);
     SkAutoTUnref<SkShader> shader(SkGradientShader::CreateLinear(points,
                                                                  colors, stops, colorCount,
                                                                  tm));
     SkPaint paint;
     GrColor paintColor;
     GrFragmentProcessor* fp;
     SkAssertResult(shader->asFragmentProcessor(context, paint,
-                                               GrProcessorUnitTest::TestMatrix(random), NULL,
+                                               GrTest::TestMatrix(random), NULL,
                                                &paintColor, &fp));
     return fp;
 }
 
 /////////////////////////////////////////////////////////////////////
 
 void GrGLLinearGradient::emitCode(GrGLFPBuilder* builder,
                                   const GrFragmentProcessor& fp,
                                   const char* outputColor,
                                   const char* inputColor,
@@ skipping 48 matching lines @@
     str->append("SkLinearGradient (");
 
     str->appendf("start: (%f, %f)", fStart.fX, fStart.fY);
     str->appendf(" end: (%f, %f) ", fEnd.fX, fEnd.fY);
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif