Add libpoppler for PDF rendering, take 2

third_party/iconv/README.chromium

+Name: libiconv
+Short Name: libiconv
+URL: git://git.savannah.gnu.org/libiconv.git
+Version: 1.14
+License: Libraries under LGPL, program under GPL
+License File: NOT_SHIPPED
+Security Critical: No
+
+Description:
+iconv is a library for converting between different character encodings.
+Used in Skia as a dependency of libpoppler, for PDF rasterization during
+testing.
+
+Local Modifications:
+No changes to files from the upstream repository.
+Platform-specific configuration files added to
+third_party/iconv/config/windows:
+  config.h
+  iconv.h
+  localcharset.h
+
+These files were created from the header templates based on instructions in:
+http://www.codeproject.com/Articles/302012/How-to-Build-libiconv-with-Microsoft-Visual-Studio,
+then kludging it to build. The process used to create them from release
+sources are:
+1. Download the libiconv-1.14 tarball from
+   http://www.gnu.org/software/libiconv/#downloading
+2. Copy and rename these files:
+    (libiconv-1.14)/libcharset/include/localcharset.h.build.in
+      -> third_party/iconv/config/windows/localcharset.h
+    (libiconv-1.14)/include/iconv.h.build.in
+      -> third_party/iconv/config/windows/iconv.h
+    (libiconv-1.14)/config.h.in
+      -> third_party/iconv/config/windows/config.h
+3. Modify localcharset.h as follows:
+    Replace
+      #if @HAVE_VISIBILITY@ && BUILDING_LIBCHARSET
+      #define LIBCHARSET_DLL_EXPORTED __attribute__((__visibility__("default")))
+      #else
+      #define LIBCHARSET_DLL_EXPORTED
+      #endif
+    with
+      #define LIBCHARSET_DLL_EXPORTED
+4. Modify config.h as follows:
+    Delete line 30:
+      #undef EILSEQ
+    Change line 686 to:
+      #define ICONV_CONST const
+5. Modify iconv.h as follows:
+    Replace
+      #if @HAVE_VISIBILITY@ && BUILDING_LIBICONV
+      #define LIBICONV_DLL_EXPORTED __attribute__((__visibility__("default")))
+      #else
+      #define LIBICONV_DLL_EXPORTED
+      #endif
+    with
+      #define LIBICONV_DLL_EXPORTED 
+    Delete all references to @DLL_VARIABLE@ (find and replace with nothing).
+    Find and replace these:
+      @ICONV_CONST@ -> const
+      @USE_MBSTATE_T@ -> USE_MBSTATE_T
+      @BROKEN_WCHAR_H@ -> BROKEN_WCHAR_H
+      @HAVE_WCHAR_T@ -> HAVE_WCHAR_T
+Note: if a dynamic library is needed for whatever reason,
+LIBCHARSET_DLL_EXPORTED and LIBICONV_DLL_EXPORTED needs to be defined as
+either __declspec(dllexport) or __declspec(dllimport).
+
+Autogenerated files (consistent across platforms) added to
+third_party/iconv/config:
+  aliases.h
+  canonical_dos.h
+  canonical.h
+  canonical_local.h
+  flags.h
+
+These files were pulled from a release tarball.
+