Updated to Chrome 45 (2454) moved from SVN to git.

core/dom/ProcessingInstruction.idl

Index: core/dom/ProcessingInstruction.idl
diff --git a/core/dom/ProcessingInstruction.idl b/core/dom/ProcessingInstruction.idl
index c082c1035109313123481eca3c09b6b7e0b60e1e..650e74ca893cbb7775d20f875ed634359d1568e5 100644
--- a/core/dom/ProcessingInstruction.idl
+++ b/core/dom/ProcessingInstruction.idl
@@ -18,13 +18,12 @@
  * Boston, MA 02110-1301, USA.
  */
 
-interface ProcessingInstruction : CharacterData {
-
-    // DOM Level 1
+// https://dom.spec.whatwg.org/#interface-processinginstruction
 
-    readonly attribute DOMString? target;
+interface ProcessingInstruction : CharacterData {
+    readonly attribute DOMString target;
 
-    // interface LinkStyle from DOM Level 2 Style Sheets
+    // ProcessingInstruction implements LinkStyle
+    // http://dev.w3.org/csswg/cssom/#requirements-on-user-agents-implementing-the-xml-stylesheet-processing-instruction
     readonly attribute StyleSheet sheet;
 };
-