Implement a part of ProcessingInstruction by using PrivateScript

LayoutTests/fast/xsl/xslt-mismatched-tags-in-xslt-expected.txt

Index: LayoutTests/fast/xsl/xslt-mismatched-tags-in-xslt-expected.txt
diff --git a/LayoutTests/fast/xsl/xslt-mismatched-tags-in-xslt-expected.txt b/LayoutTests/fast/xsl/xslt-mismatched-tags-in-xslt-expected.txt
index bfbdbcccc538d940a98b61dbd7a39b146d1c6954..ce1ffef9614560d58f446a188c01bd13cb6fb0ac 100644
--- a/LayoutTests/fast/xsl/xslt-mismatched-tags-in-xslt-expected.txt
+++ b/LayoutTests/fast/xsl/xslt-mismatched-tags-in-xslt-expected.txt
@@ -1,12 +1,16 @@
-CONSOLE ERROR: line 9: Opening and ending tag mismatch: p line 8 and body
-
-CONSOLE ERROR: line 10: Opening and ending tag mismatch: body line 6 and html
-
-CONSOLE ERROR: line 11: Opening and ending tag mismatch: html line 5 and xsl:template
-
-CONSOLE ERROR: line 12: Opening and ending tag mismatch: template line 4 and stylesheet
-
-CONSOLE ERROR: line 12: Premature end of data in tag stylesheet line 2
-
 layer at (0,0) size 800x600
   RenderView at (0,0) size 800x600
+layer at (0,0) size 800x175
+  RenderBlock {HTML} at (0,0) size 800x175
+    RenderBody {BODY} at (8,8) size 784x159
+layer at (8,8) size 304x154
+  RenderPartObject {IFRAME} at (0,0) size 304x154 [border: (2px inset #EEEEEE)]
+    layer at (0,0) size 300x150
+      RenderView at (0,0) size 300x150
+    layer at (0,0) size 300x150
+      RenderBlock {HTML} at (0,0) size 300x150
+        RenderBody {BODY} at (8,8) size 284x126
+          RenderBlock {P} at (0,0) size 284x20
+            RenderText {#text} at (0,0) size 218x19
+              text run at (0,0) width 218: "You should see error text above this"
+          RenderBlock {P} at (0,36) size 284x0