Implement a NEON version of morphology. This is good for ~2.2X speedup on Tegra3.

gyp/opts.gyp

Index: gyp/opts.gyp
diff --git a/gyp/opts.gyp b/gyp/opts.gyp
index 4fc0f34ebf17cddff5723f733f285330f4444632..01bcddefdbba969b7a8e52c0725b58ffd742b0c6 100644
--- a/gyp/opts.gyp
+++ b/gyp/opts.gyp
@@ -80,7 +80,6 @@
             '../src/opts/SkBlitRow_opts_arm.cpp',
             '../src/opts/SkBlitRow_opts_arm.h',
             '../src/opts/SkBlurImage_opts_none.cpp',
-            '../src/opts/SkMorphology_opts_none.cpp',
             '../src/opts/SkXfermode_opts_arm.cpp',
           ],
           'conditions': [
@@ -179,6 +178,7 @@
         '../src/opts/SkBitmapProcState_matrix_clamp_neon.h',
         '../src/opts/SkBitmapProcState_matrix_repeat_neon.h',
         '../src/opts/SkBlitRow_opts_arm_neon.cpp',
+        '../src/opts/SkMorphology_opts_neon.cpp',
         '../src/opts/SkXfermode_opts_arm_neon.cpp',
       ],
     },