Implement SSE2-based implementations of the morphology filters (dilate & erode). This gives a 3-5X speedup over the naive implementation, and also mitigates a timing-based security attack in Chrome (https://code.google.com/p/chromium/issues/detail?id=251711).

NOTE: this will require a corresponding GYP change on the Skia roll into Chrome: https://codereview.chromium.org/52453004/

R=mtklein@google.com, reed@google.com

Review URL: https://codereview.chromium.org/52603004

git-svn-id: http://skia.googlecode.com/svn/trunk@12038 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gyp/effects.gyp b/gyp/effects.gyp
index d22debb..7b256d3 100644
--- a/gyp/effects.gyp
+++ b/gyp/effects.gyp
@@ -17,6 +17,7 @@
       'include_dirs': [
         '../include/effects',
         '../src/effects',
+        '../src/opts',
         '../src/core',
       ],
       'direct_dependent_settings': {