Implement correct clipping for image filters.

gyp/gmslides.gypi

 # include this gypi to include all the golden master slides.
 {
   'include_dirs': [
     '../gm',
     # include dirs needed by particular GMs
     '../src/utils/debugger',
     '../src/images',
     '../src/lazy',
   ],
   'sources': [
@@ skipping 70 matching lines @@
     '../gm/gradients.cpp',
     '../gm/gradients_no_texture.cpp',
     '../gm/gradientDirtyLaundry.cpp',
     '../gm/gradient_matrix.cpp',
     '../gm/gradtext.cpp',
     '../gm/hairlines.cpp',
     '../gm/hairmodes.cpp',
     '../gm/hittestpath.cpp',
     '../gm/imagealphathreshold.cpp',
     '../gm/imageblur.cpp',
+    '../gm/imageblurtiled.cpp',
     '../gm/imagemagnifier.cpp',
     '../gm/inversepaths.cpp',
     '../gm/lerpmode.cpp',
     '../gm/lighting.cpp',
     '../gm/lumafilter.cpp',
     '../gm/image.cpp',
     '../gm/imagefiltersbase.cpp',
+    '../gm/imagefiltersclipped.cpp',
     '../gm/imagefilterscropped.cpp',
     '../gm/imagefiltersgraph.cpp',
     '../gm/imagefiltersscaled.cpp',
     '../gm/internal_links.cpp',
     '../gm/lcdtext.cpp',
     '../gm/linepaths.cpp',
     '../gm/matrixconvolution.cpp',
     '../gm/megalooper.cpp',
     '../gm/mixedxfermodes.cpp',
     '../gm/modecolorfilters.cpp',
@@ skipping 63 matching lines @@
     # Files needed by particular GMs
     '../src/utils/debugger/SkDrawCommand.h',
     '../src/utils/debugger/SkDrawCommand.cpp',
     '../src/utils/debugger/SkDebugCanvas.h',
     '../src/utils/debugger/SkDebugCanvas.cpp',
     '../src/utils/debugger/SkObjectParser.h',
     '../src/utils/debugger/SkObjectParser.cpp',
 
   ],
 }