Update libxml to 2.7.7.

third_party/libxml/elfgcchack.h

Index: third_party/libxml/elfgcchack.h
diff --git a/third_party/libxml/elfgcchack.h b/third_party/libxml/elfgcchack.h
index e1d21bb2336ea0dd6a06e17674640bc7229bf19c..84e81516a5583b38d03f73a0c5ce71be0ce0d599 100644
--- a/third_party/libxml/elfgcchack.h
+++ b/third_party/libxml/elfgcchack.h
@@ -1991,6 +1991,18 @@ extern __typeof (xmlCheckVersion) xmlCheckVersion__internal_alias __attribute((v
 #endif
 #endif
 
+#if defined(LIBXML_TREE_ENABLED)
+#ifdef bottom_tree
+#undef xmlChildElementCount
+extern __typeof (xmlChildElementCount) xmlChildElementCount __attribute((alias("xmlChildElementCount__internal_alias")));
+#else
+#ifndef xmlChildElementCount
+extern __typeof (xmlChildElementCount) xmlChildElementCount__internal_alias __attribute((visibility("hidden")));
+#define xmlChildElementCount xmlChildElementCount__internal_alias
+#endif
+#endif
+#endif
+
 #ifdef bottom_encoding
 #undef xmlCleanupCharEncodingHandlers
 extern __typeof (xmlCleanupCharEncodingHandlers) xmlCleanupCharEncodingHandlers __attribute((alias("xmlCleanupCharEncodingHandlers__internal_alias")));
@@ -3419,6 +3431,18 @@ extern __typeof (xmlFindCharEncodingHandler) xmlFindCharEncodingHandler__interna
 #endif
 #endif
 
+#if defined(LIBXML_TREE_ENABLED)
+#ifdef bottom_tree
+#undef xmlFirstElementChild
+extern __typeof (xmlFirstElementChild) xmlFirstElementChild __attribute((alias("xmlFirstElementChild__internal_alias")));
+#else
+#ifndef xmlFirstElementChild
+extern __typeof (xmlFirstElementChild) xmlFirstElementChild__internal_alias __attribute((visibility("hidden")));
+#define xmlFirstElementChild xmlFirstElementChild__internal_alias
+#endif
+#endif
+#endif
+
 #ifdef bottom_valid
 #undef xmlFreeAttributeTable
 extern __typeof (xmlFreeAttributeTable) xmlFreeAttributeTable __attribute((alias("xmlFreeAttributeTable__internal_alias")));
@@ -4759,6 +4783,18 @@ extern __typeof (xmlKeepBlanksDefault) xmlKeepBlanksDefault__internal_alias __at
 #endif
 #endif
 
+#if defined(LIBXML_TREE_ENABLED)
+#ifdef bottom_tree
+#undef xmlLastElementChild
+extern __typeof (xmlLastElementChild) xmlLastElementChild __attribute((alias("xmlLastElementChild__internal_alias")));
+#else
+#ifndef xmlLastElementChild
+extern __typeof (xmlLastElementChild) xmlLastElementChild__internal_alias __attribute((visibility("hidden")));
+#define xmlLastElementChild xmlLastElementChild__internal_alias
+#endif
+#endif
+#endif
+
 #ifdef bottom_parserInternals
 #undef xmlLineNumbersDefault
 extern __typeof (xmlLineNumbersDefault) xmlLineNumbersDefault __attribute((alias("xmlLineNumbersDefault__internal_alias")));
@@ -5162,6 +5198,16 @@ extern __typeof (xmlMemDisplay) xmlMemDisplay__internal_alias __attribute((visib
 #endif
 
 #ifdef bottom_xmlmemory
+#undef xmlMemDisplayLast
+extern __typeof (xmlMemDisplayLast) xmlMemDisplayLast __attribute((alias("xmlMemDisplayLast__internal_alias")));
+#else
+#ifndef xmlMemDisplayLast
+extern __typeof (xmlMemDisplayLast) xmlMemDisplayLast__internal_alias __attribute((visibility("hidden")));
+#define xmlMemDisplayLast xmlMemDisplayLast__internal_alias
+#endif
+#endif
+
+#ifdef bottom_xmlmemory
 #undef xmlMemFree
 extern __typeof (xmlMemFree) xmlMemFree __attribute((alias("xmlMemFree__internal_alias")));
 #else
@@ -6043,6 +6089,16 @@ extern __typeof (xmlNewElementContent) xmlNewElementContent__internal_alias __at
 #endif
 #endif
 
+#ifdef bottom_entities
+#undef xmlNewEntity
+extern __typeof (xmlNewEntity) xmlNewEntity __attribute((alias("xmlNewEntity__internal_alias")));
+#else
+#ifndef xmlNewEntity
+extern __typeof (xmlNewEntity) xmlNewEntity__internal_alias __attribute((visibility("hidden")));
+#define xmlNewEntity xmlNewEntity__internal_alias
+#endif
+#endif
+
 #ifdef bottom_parserInternals
 #undef xmlNewEntityInputStream
 extern __typeof (xmlNewEntityInputStream) xmlNewEntityInputStream __attribute((alias("xmlNewEntityInputStream__internal_alias")));
@@ -6367,6 +6423,18 @@ extern __typeof (xmlNextChar) xmlNextChar__internal_alias __attribute((visibilit
 #endif
 #endif
 
+#if defined(LIBXML_TREE_ENABLED)
+#ifdef bottom_tree
+#undef xmlNextElementSibling
+extern __typeof (xmlNextElementSibling) xmlNextElementSibling __attribute((alias("xmlNextElementSibling__internal_alias")));
+#else
+#ifndef xmlNextElementSibling
+extern __typeof (xmlNextElementSibling) xmlNextElementSibling__internal_alias __attribute((visibility("hidden")));
+#define xmlNextElementSibling xmlNextElementSibling__internal_alias
+#endif
+#endif
+#endif
+
 #ifdef bottom_xmlIO
 #undef xmlNoNetExternalEntityLoader
 extern __typeof (xmlNoNetExternalEntityLoader) xmlNoNetExternalEntityLoader __attribute((alias("xmlNoNetExternalEntityLoader__internal_alias")));
@@ -7769,6 +7837,18 @@ extern __typeof (xmlPopInputCallbacks) xmlPopInputCallbacks__internal_alias __at
 #endif
 #endif
 
+#if defined(LIBXML_TREE_ENABLED)
+#ifdef bottom_tree
+#undef xmlPreviousElementSibling
+extern __typeof (xmlPreviousElementSibling) xmlPreviousElementSibling __attribute((alias("xmlPreviousElementSibling__internal_alias")));
+#else
+#ifndef xmlPreviousElementSibling
+extern __typeof (xmlPreviousElementSibling) xmlPreviousElementSibling__internal_alias __attribute((visibility("hidden")));
+#define xmlPreviousElementSibling xmlPreviousElementSibling__internal_alias
+#endif
+#endif
+#endif
+
 #ifdef bottom_uri
 #undef xmlPrintURI
 extern __typeof (xmlPrintURI) xmlPrintURI __attribute((alias("xmlPrintURI__internal_alias")));
@@ -9843,6 +9923,18 @@ extern __typeof (xmlSchemaValidCtxtGetOptions) xmlSchemaValidCtxtGetOptions__int
 
 #if defined(LIBXML_SCHEMAS_ENABLED)
 #ifdef bottom_xmlschemas
+#undef xmlSchemaValidCtxtGetParserCtxt
+extern __typeof (xmlSchemaValidCtxtGetParserCtxt) xmlSchemaValidCtxtGetParserCtxt __attribute((alias("xmlSchemaValidCtxtGetParserCtxt__internal_alias")));
+#else
+#ifndef xmlSchemaValidCtxtGetParserCtxt
+extern __typeof (xmlSchemaValidCtxtGetParserCtxt) xmlSchemaValidCtxtGetParserCtxt__internal_alias __attribute((visibility("hidden")));
+#define xmlSchemaValidCtxtGetParserCtxt xmlSchemaValidCtxtGetParserCtxt__internal_alias
+#endif
+#endif
+#endif
+
+#if defined(LIBXML_SCHEMAS_ENABLED)
+#ifdef bottom_xmlschemas
 #undef xmlSchemaValidateDoc
 extern __typeof (xmlSchemaValidateDoc) xmlSchemaValidateDoc __attribute((alias("xmlSchemaValidateDoc__internal_alias")));
 #else
@@ -15399,6 +15491,18 @@ extern __typeof (xmlXIncludeProcessTreeFlags) xmlXIncludeProcessTreeFlags__inter
 
 #if defined(LIBXML_XINCLUDE_ENABLED)
 #ifdef bottom_xinclude
+#undef xmlXIncludeProcessTreeFlagsData
+extern __typeof (xmlXIncludeProcessTreeFlagsData) xmlXIncludeProcessTreeFlagsData __attribute((alias("xmlXIncludeProcessTreeFlagsData__internal_alias")));
+#else
+#ifndef xmlXIncludeProcessTreeFlagsData
+extern __typeof (xmlXIncludeProcessTreeFlagsData) xmlXIncludeProcessTreeFlagsData__internal_alias __attribute((visibility("hidden")));
+#define xmlXIncludeProcessTreeFlagsData xmlXIncludeProcessTreeFlagsData__internal_alias
+#endif
+#endif
+#endif
+
+#if defined(LIBXML_XINCLUDE_ENABLED)
+#ifdef bottom_xinclude
 #undef xmlXIncludeSetFlags
 extern __typeof (xmlXIncludeSetFlags) xmlXIncludeSetFlags __attribute((alias("xmlXIncludeSetFlags__internal_alias")));
 #else