use the supplied matrix instead of the texture w/h div for the bicubic GPU effect

src/gpu/effects/GrBicubicEffect.cpp

 #include "GrBicubicEffect.h"
 
 #define DS(x) SkDoubleToScalar(x)
 
 const SkScalar GrBicubicEffect::gMitchellCoefficients[16] = {
     DS( 1.0 / 18.0), DS(-9.0 / 18.0), DS( 15.0 / 18.0), DS( -7.0 / 18.0),
     DS(16.0 / 18.0), DS( 0.0 / 18.0), DS(-36.0 / 18.0), DS( 21.0 / 18.0),
     DS( 1.0 / 18.0), DS( 9.0 / 18.0), DS( 27.0 / 18.0), DS(-21.0 / 18.0),
     DS( 0.0 / 18.0), DS( 0.0 / 18.0), DS( -6.0 / 18.0), DS(  7.0 / 18.0),
 };
@@ skipping 98 matching lines @@
         }
     }
     this->setWillNotUseInputColor();
 }
 
 GrBicubicEffect::GrBicubicEffect(GrTexture* texture,
                                  const SkScalar coefficients[16],
                                  const SkMatrix &matrix,
                                  const GrTextureParams &params,
                                  GrCoordSet coordSet)
-  : INHERITED(texture, MakeDivByTextureWHMatrix(texture), params, coordSet) {
+  : INHERITED(texture, matrix, params, coordSet) {
     for (int y = 0; y < 4; y++) {
         for (int x = 0; x < 4; x++) {
             // Convert from row-major scalars to column-major floats.
             fCoefficients[x * 4 + y] = SkScalarToFloat(coefficients[y * 4 + x]);
         }
     }
     this->setWillNotUseInputColor();
 }
 
 GrBicubicEffect::~GrBicubicEffect() {
@@ skipping 22 matching lines @@
                                          const GrDrawTargetCaps&,
                                          GrTexture* textures[]) {
     int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
                                       GrEffectUnitTest::kAlphaTextureIdx;
     SkScalar coefficients[16];
     for (int i = 0; i < 16; i++) {
         coefficients[i] = random->nextSScalar1();
     }
     return GrBicubicEffect::Create(textures[texIdx], coefficients);
 }