Revert of Add SkCodec, including PNG implementation.

gyp/libpng.gyp

Index: gyp/libpng.gyp
diff --git a/gyp/libpng.gyp b/gyp/libpng.gyp
index 96120a8a618a9f79201c3ecdaab19eb1ffbdd65a..92ff8d5e77cdf4a6acc98092096af7ef63af4318 100644
--- a/gyp/libpng.gyp
+++ b/gyp/libpng.gyp
@@ -32,35 +32,10 @@
               '-w',
               '-fvisibility=hidden',
             ],
-            'conditions': [
-              ['not arm_neon', {
-                'defines': [
-                    # FIXME: Why is this needed? Without it, pngpriv.h sets it
-                    # to 2 if __ARM_NEON is defined, but shouldn't __ARM_NEON
-                    # not be defined since arm_neon is 0?
-                    'PNG_ARM_NEON_OPT=0',
-                ],
-              }],
-            ],
-            'actions': [
-              {
-                'action_name': 'generate_pngconf',
-                'variables' : {
-                  'prebuilt': '../third_party/externals/libpng/scripts/pnglibconf.h.prebuilt',
-                  'generated': '../third_party/externals/libpng/pnglibconf.h',
-                },
-                'inputs': [
-                  '<(prebuilt)',
-                ],
-                'outputs': [
-                  '<(generated)',
-                ],
-                'action': ['python', 'copy_file.py', '<(prebuilt)', '<(generated)'],
-              },
-            ],
             'sources': [
               '../third_party/externals/libpng/png.c',
               '../third_party/externals/libpng/pngerror.c',
+              '../third_party/externals/libpng/pnggccrd.c',
               '../third_party/externals/libpng/pngget.c',
               '../third_party/externals/libpng/pngmem.c',
               '../third_party/externals/libpng/pngpread.c',
@@ -70,6 +45,7 @@
               '../third_party/externals/libpng/pngrutil.c',
               '../third_party/externals/libpng/pngset.c',
               '../third_party/externals/libpng/pngtrans.c',
+              '../third_party/externals/libpng/pngvcrd.c',
               '../third_party/externals/libpng/pngwio.c',
               '../third_party/externals/libpng/pngwrite.c',
               '../third_party/externals/libpng/pngwtran.c',