create GrTestUtils.h, move some common functions into it

src/gpu/GrOvalRenderer.cpp

Index: src/gpu/GrOvalRenderer.cpp
diff --git a/src/gpu/GrOvalRenderer.cpp b/src/gpu/GrOvalRenderer.cpp
index d22b4628bb54c314e2368d9d46d975838d0df0ec..3a6f1b385c90a85fec72ef0b37336f7922a28240 100644
--- a/src/gpu/GrOvalRenderer.cpp
+++ b/src/gpu/GrOvalRenderer.cpp
@@ -226,7 +226,7 @@ GrGeometryProcessor* CircleEdgeEffect::TestCreate(SkRandom* random,
                                                   GrTexture* textures[]) {
     return CircleEdgeEffect::Create(GrRandomColor(random),
                                     random->nextBool(),
-                                    GrProcessorUnitTest::TestMatrix(random));
+                                    GrTest::TestMatrix(random));
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -424,7 +424,7 @@ GrGeometryProcessor* EllipseEdgeEffect::TestCreate(SkRandom* random,
                                                    GrTexture* textures[]) {
     return EllipseEdgeEffect::Create(GrRandomColor(random),
                                      random->nextBool(),
-                                     GrProcessorUnitTest::TestMatrix(random));
+                                     GrTest::TestMatrix(random));
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -638,7 +638,7 @@ GrGeometryProcessor* DIEllipseEdgeEffect::TestCreate(SkRandom* random,
                                                      const GrDrawTargetCaps&,
                                                      GrTexture* textures[]) {
     return DIEllipseEdgeEffect::Create(GrRandomColor(random),
-                                       GrProcessorUnitTest::TestMatrix(random),
+                                       GrTest::TestMatrix(random),
                                        (Mode)(random->nextRangeU(0,2)));
 }