GYP changes and scripts for compiling Skia for ChromeOS

gyp/xml.gyp

 {
   'targets': [
     {
       'target_name': 'xml',
       'product_name': 'skia_xml',
       'type': 'static_library',
       'standalone_static_library': 1,
       'include_dirs': [
         '../include/config',
         '../include/core',
@@ skipping 14 matching lines @@
         '../src/xml/SkJS.cpp',
         '../src/xml/SkJSDisplayable.cpp',
         '../src/xml/SkXMLParser.cpp',
         '../src/xml/SkXMLPullParser.cpp',
         '../src/xml/SkXMLWriter.cpp',
       ],
       'sources!': [
           '../src/xml/SkXMLPullParser.cpp', #if 0 around class decl in header
       ],
       'conditions': [
-        [ 'skia_os in ["win", "mac", "linux", "freebsd", "openbsd", "solaris", "android", "ios", "nacl"]', {
+        [ 'skia_os in ["win", "mac", "linux", "freebsd", "openbsd", "solaris", "android", "ios", "nacl", "chromeos"]', {
           'sources!': [
             # no jsapi.h by default on system
             '../include/xml/SkJS.h',
             '../src/xml/SkJS.cpp',
             '../src/xml/SkJSDisplayable.cpp',
           ],
         }],
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '../include/xml',
         ],
       },
     },
   ],
 }
 
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