Re-enable imageresizetiled, but skip it in tilegrid and rtree.

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 73 matching lines @@
     '../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',
-    # This GM seems to have some issues with rtree and tilegrid; disabled for now.
-    #'../gm/imageresizetiled.cpp',
+    '../gm/imageresizetiled.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',
@@ skipping 71 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',
 
   ],
 }