Move SkComposeImageFilter into its own {.h, .cpp} files

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 "SkTypes.h"
 
 #include "SkBitmapProcShader.h"
@@ skipping 10 matching lines @@
 #include "SkBicubicImageFilter.h"
 #include "SkBitmapSource.h"
 #include "SkBlurDrawLooper.h"
 #include "SkBlurImageFilter.h"
 #include "SkBlurMaskFilter.h"
 #include "SkColorFilter.h"
 #include "SkColorFilterImageFilter.h"
 #include "SkColorMatrixFilter.h"
 #include "SkColorShader.h"
 #include "SkColorTable.h"
+#include "SkComposeImageFilter.h"
 #include "SkComposeShader.h"
 #include "SkCornerPathEffect.h"
 #include "SkDashPathEffect.h"
 #include "SkData.h"
 #include "SkDataSet.h"
 #include "SkDiscretePathEffect.h"
 #include "SkDisplacementMapEffect.h"
 #include "SkEmptyShader.h"
 #include "SkEmbossMaskFilter.h"
 #include "SkFlattenable.h"
@@ skipping 63 matching lines @@
 
     SkArithmeticMode::InitializeFlattenables();
     SkBlurMaskFilter::InitializeFlattenables();
     SkColorFilter::InitializeFlattenables();
     SkGradientShader::InitializeFlattenables();
     SkImages::InitializeFlattenables();
     SkLightingImageFilter::InitializeFlattenables();
     SkTableColorFilter::InitializeFlattenables();
     SkXfermode::InitializeFlattenables();
 }