Revert of WIP: Added support for giflib, updated jpeg and png

gyp/common_variables.gypi

Index: gyp/common_variables.gypi
diff --git a/gyp/common_variables.gypi b/gyp/common_variables.gypi
index 1b9cf331e84441d48b79b6064f69964a949cc3b4..1031b52a1da107390dc22eca2173662b3ff3f4ed 100644
--- a/gyp/common_variables.gypi
+++ b/gyp/common_variables.gypi
@@ -117,6 +117,13 @@
           }
         ],
       ],
+
+      # skia_giflib_static - on OS variants that normally would link giflib
+      #     with '-lgif' and include the headers from '/usr/include/gif_lib.h',
+      #     don't do that; instead compile and staticlly link the version of
+      #     giflib in third_party/externals/giflib.
+      'skia_giflib_static%': '0',
+
 
       # skia_no_fontconfig - On POSIX systems that would normally use the
       #     SkFontHost_fontconfig interface; use the SkFontHost_linux
@@ -199,6 +206,7 @@
     'os_posix%': '<(os_posix)',
 
     'skia_freetype_static%': '<(skia_freetype_static)',
+    'skia_giflib_static%': '<(skia_giflib_static)',
     'skia_no_fontconfig%': '<(skia_no_fontconfig)',
     'skia_sanitizer%': '<(skia_sanitizer)',
     'skia_scalar%': '<(skia_scalar)',