Remove all code related to NaCl

gyp/common_variables.gypi

Index: gyp/common_variables.gypi
diff --git a/gyp/common_variables.gypi b/gyp/common_variables.gypi
index 80ab7c91ed7c996761a5e61d43f179c7eb73cceb..b9f0bd7a9aa884501240e1362a20a4add1acf6f4 100644
--- a/gyp/common_variables.gypi
+++ b/gyp/common_variables.gypi
@@ -102,10 +102,7 @@
           'arm_version%': 7,
           'arm_neon%': 0, # neon asm files known not to work with the ios build
         }],
-        [ 'skia_os == "nacl"', {
-          'skia_egl%': 1,
-        }],
-        [ 'skia_os in ["android", "nacl"] and not skia_android_framework',
+        [ 'skia_os == "android" and not skia_android_framework',
           # skia_freetype_static - on OS variants that normally would
           #     dynamically link the system FreeType library, don't do
           #     that; instead statically link to the version in