Revert of Refactoring of GPU NormalMap handling out into its own class

src/ports/SkGlobalInitialization_default.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Sk1DPathEffect.h"
 #include "Sk2DPathEffect.h"
 #include "SkAlphaThresholdFilter.h"
@@ skipping 70 matching lines @@
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkColorMatrixFilterRowMajor255)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkLumaColorFilter)
     SkAlphaThresholdFilter::InitializeFlattenables();
     SkArithmeticMode::InitializeFlattenables();
     SkTableColorFilter::InitializeFlattenables();
 
     // Shader
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkPerlinNoiseShader)
     SkGradientShader::InitializeFlattenables();
     SkLightingShader::InitializeFlattenables();
-    SkLightingShader::NormalMapSource::InitializeFlattenables();
-
 
     // PathEffect
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkArcToPathEffect)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkCornerPathEffect)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDashPathEffect)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDiscretePathEffect)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkPath1DPathEffect)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkLine2DPathEffect)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkPath2DPathEffect)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkSumPathEffect)
@@ skipping 12 matching lines @@
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkXfermodeImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkMagnifierImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkMatrixConvolutionImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkOffsetImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkComposeImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkMergeImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkColorFilterImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDownSampleImageFilter)
     SkLightingImageFilter::InitializeFlattenables();
 }