Initial picture shader implementation

gyp/core.gypi

 # Include this gypi to include all 'core' files
 # The parent gyp/gypi file must define
 #       'skia_src_path'     e.g. skia/trunk/src
 #       'skia_include_path' e.g. skia/trunk/include
 #
 # The skia build defines these in common_variables.gypi
 #
 {
     'sources': [
         '<(skia_src_path)/core/ARGB32_Clamp_Bilinear_BitmapShader.h',
@@ skipping 115 matching lines @@
         '<(skia_src_path)/core/SkPathHeap.h',
         '<(skia_src_path)/core/SkPathMeasure.cpp',
         '<(skia_src_path)/core/SkPathRef.cpp',
         '<(skia_src_path)/core/SkPicture.cpp',
         '<(skia_src_path)/core/SkPictureFlat.cpp',
         '<(skia_src_path)/core/SkPictureFlat.h',
         '<(skia_src_path)/core/SkPicturePlayback.cpp',
         '<(skia_src_path)/core/SkPicturePlayback.h',
         '<(skia_src_path)/core/SkPictureRecord.cpp',
         '<(skia_src_path)/core/SkPictureRecord.h',
+        '<(skia_src_path)/core/SkPictureShader.cpp',
+        '<(skia_src_path)/core/SkPictureShader.h',
         '<(skia_src_path)/core/SkPictureStateTree.cpp',
         '<(skia_src_path)/core/SkPictureStateTree.h',
         '<(skia_src_path)/core/SkPixelRef.cpp',
         '<(skia_src_path)/core/SkPoint.cpp',
         '<(skia_src_path)/core/SkProcSpriteBlitter.cpp',
         '<(skia_src_path)/core/SkPtrRecorder.cpp',
         '<(skia_src_path)/core/SkQuadClipper.cpp',
         '<(skia_src_path)/core/SkQuadClipper.h',
         '<(skia_src_path)/core/SkQuadTree.cpp',
         '<(skia_src_path)/core/SkQuadTree.h',
@@ skipping 215 matching lines @@
         '<(skia_src_path)/pathops/SkPathOpsPoint.h',
         '<(skia_src_path)/pathops/SkPathOpsQuad.h',
         '<(skia_src_path)/pathops/SkPathOpsRect.h',
         '<(skia_src_path)/pathops/SkPathOpsTriangle.h',
         '<(skia_src_path)/pathops/SkPathOpsTypes.h',
         '<(skia_src_path)/pathops/SkPathWriter.h',
         '<(skia_src_path)/pathops/SkQuarticRoot.h',
         '<(skia_src_path)/pathops/SkReduceOrder.h',
     ],
 }