exp/html: ignore </html> in afterBodyIM when parsing a fragment

Pass 1 additional test.

R=nigeltao
CC=golang-dev
https://golang.org/cl/6454124

src/pkg/exp/html/parse.go

@@ -42,6 +42,8 @@ type parser struct {
 	fosterParenting bool
 	// quirks is whether the parser is operating in "quirks mode."
 	quirks bool
+	// fragment is whether the parser is parsing an HTML fragment.
+	fragment bool
 	// context is the context element when parsing an HTML fragment
 	// (section 12.4).
 	context *Node
@@ -1692,7 +1694,9 @@ func afterBodyIM(p *parser) bool {
 		}
 	case EndTagToken:
 		if p.tok.DataAtom == a.Html {
+			if !p.fragment {
 				p.im = afterAfterBodyIM
+			}
 			return true
 		}
 	case CommentToken:
@@ -2054,6 +2058,7 @@ func ParseFragment(r io.Reader, context *Node) ([]*Node, error) {
 			Type: DocumentNode,
 		},
 		scripting: true,
+		fragment:  true,
 		context:   context,
 	}
 

src/pkg/exp/html/testlogs/tests_innerHTML_1.dat.log

@@ -80,6 +80,6 @@ PASS "</select><option>"
 PASS "<input><option>"
 PASS "<keygen><option>"
 PASS "<textarea><option>"
-FAIL "</html><!--abc-->"
+PASS "</html><!--abc-->"
 PASS "</frameset><frame>"
 PASS ""