Mark correct tree-scope dirty removing link in shadow.

third_party/WebKit/Source/core/dom/ProcessingInstruction.cpp

Index: third_party/WebKit/Source/core/dom/ProcessingInstruction.cpp
diff --git a/third_party/WebKit/Source/core/dom/ProcessingInstruction.cpp b/third_party/WebKit/Source/core/dom/ProcessingInstruction.cpp
index 051b670bc02913491fdc7248ac1dd30ef43e3f46..dabc45818a76cb52881a8e179cd2874bbfe12292 100644
--- a/third_party/WebKit/Source/core/dom/ProcessingInstruction.cpp
+++ b/third_party/WebKit/Source/core/dom/ProcessingInstruction.cpp
@@ -269,8 +269,11 @@ void ProcessingInstruction::removedFrom(ContainerNode* insertionPoint) {
     return;
 
   // No need to remove XSLStyleSheet from StyleEngine.
-  if (!DocumentXSLT::processingInstructionRemovedFromDocument(document(), this))
-    document().styleEngine().removeStyleSheetCandidateNode(*this);
+  if (!DocumentXSLT::processingInstructionRemovedFromDocument(document(),
+                                                              this)) {
+    document().styleEngine().removeStyleSheetCandidateNode(*this,
+                                                           *insertionPoint);
+  }
 
   StyleSheet* removedSheet = m_sheet;
   if (m_sheet) {