Since we're only using it on Linux now, just require poppler as a system dependency.

gyp/iconv.gyp

Index: gyp/iconv.gyp
diff --git a/gyp/iconv.gyp b/gyp/iconv.gyp
deleted file mode 100644
index fbe16f79d83476c2c1eac4023ffcf1a432cc9fd7..0000000000000000000000000000000000000000
--- a/gyp/iconv.gyp
+++ /dev/null
@@ -1,43 +0,0 @@
-# GYP for iconv
-#
-# NOTE: WINDOWS BUILD ONLY.
-# iconv should be native to Mac and Linux.
-#
-# Based on instructions found on http://www.codeproject.com/Articles/302012/How-to-Build-libiconv-with-Microsoft-Visual-Studio
-# See the relevant README.chromium file for more information.
-
-{
-  'variables': {
-    'skia_warnings_as_errors': 0,
-  },
-  'targets': [
-    {
-      'target_name': 'iconv',
-      'type': 'static_library',
-      'include_dirs' : [
-        '../third_party/externals/iconv/lib',
-        '../third_party/iconv/config',
-      ],
-      'sources': [
-        '../third_party/externals/iconv/lib/iconv.c',
-        '../third_party/externals/iconv/libcharset/lib/localcharset.c',
-      ],
-
-      'conditions': [
-        ['skia_os == "win"', {
-          'include_dirs': [
-            '../third_party/iconv/config/windows',
-          ],
-          'direct_dependent_settings': {
-            'include_dirs': [
-              '../third_party/iconv/config/windows',
-            ],
-          },
-          'defines': [
-            'LIBDIR',
-          ],
-        }],
-      ],
-    },
-  ],
-}