CONTINUED Make FrameSelection to hold non-canonicalized positions

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

Index: third_party/WebKit/Source/core/dom/SynchronousMutationObserver.cpp
diff --git a/third_party/WebKit/Source/core/dom/SynchronousMutationObserver.cpp b/third_party/WebKit/Source/core/dom/SynchronousMutationObserver.cpp
index 4add663f48d6d21458a15f1d6ceb6dffdfd635ac..07e18e4b20cf15b6ae62309f85d7181d6d09466e 100644
--- a/third_party/WebKit/Source/core/dom/SynchronousMutationObserver.cpp
+++ b/third_party/WebKit/Source/core/dom/SynchronousMutationObserver.cpp
@@ -12,14 +12,26 @@ namespace blink {
 SynchronousMutationObserver::SynchronousMutationObserver()
     : LifecycleObserver(nullptr) {}
 
+void SynchronousMutationObserver::didChangeAttribute(const Element&) {}
+
 void SynchronousMutationObserver::didChangeChildren(const ContainerNode&) {}
-void SynchronousMutationObserver::didMergeTextNodes(Text&, unsigned) {}
+
+void SynchronousMutationObserver::didMergeTextNodes(const Text&,
+                                                    const NodeWithIndex&,
+                                                    unsigned oldLength) {}
+
+void SynchronousMutationObserver::didMoveTreeToNewDocument() {}
+
 void SynchronousMutationObserver::didSplitTextNode(const Text&) {}
+
 void SynchronousMutationObserver::didUpdateCharacterData(CharacterData*,
                                                          unsigned,
                                                          unsigned,
                                                          unsigned) {}
+
+// Called before removing container node.
 void SynchronousMutationObserver::nodeChildrenWillBeRemoved(ContainerNode&) {}
+
 void SynchronousMutationObserver::nodeWillBeRemoved(Node&) {}
 
 }  // namespace blink