Add support for autofill server experiments

BUG=none
TEST=unit_tests --gtest_filter=AutoFillMetricsTest.QualityMetricsWithExperimentId:AutoFillQueryXmlParserTest.ParseExperimentId

Review URL: http://codereview.chromium.org/6260027

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@73216 0039d316-1c4b-4281-b951-d872f2087c98
void AutoFillXmlParser::CharacterData(
    buzz::XmlParseContext* context, const char* text, int len) {
}

void AutoFillXmlParser::CharacterData(
    buzz::XmlParseContext* context, const char* text, int len) {
}
