Rewrite DocumentMarkerController to use SynchronousMutationObserver

third_party/WebKit/Source/core/dom/SynchronousMutationNotifier.h

Index: third_party/WebKit/Source/core/dom/SynchronousMutationNotifier.h
diff --git a/third_party/WebKit/Source/core/dom/SynchronousMutationNotifier.h b/third_party/WebKit/Source/core/dom/SynchronousMutationNotifier.h
index 813f2097cbe8aba08c885c1cf40476beab0389b2..9045dbeb55edaaadc215c94a242425ddd46ff143 100644
--- a/third_party/WebKit/Source/core/dom/SynchronousMutationNotifier.h
+++ b/third_party/WebKit/Source/core/dom/SynchronousMutationNotifier.h
@@ -22,6 +22,19 @@ class Text;
 class CORE_EXPORT SynchronousMutationNotifier
     : public LifecycleNotifier<Document, SynchronousMutationObserver> {
  public:
+  class ScopedNotificationSuppressor {
+   public:
+    ScopedNotificationSuppressor(SynchronousMutationNotifier*);
+    ~ScopedNotificationSuppressor();
+
+   private:
+    DISALLOW_COPY_AND_ASSIGN(ScopedNotificationSuppressor);
+
+    Persistent<SynchronousMutationNotifier> m_notifier;
+  };
+
+  DECLARE_VIRTUAL_TRACE();
+
   // TODO(yosin): We will have |notifyXXX()| functions defined in
   // |SynchronousMutationObserver|.
   void notifyChangeChildren(const ContainerNode&);
@@ -37,11 +50,28 @@ class CORE_EXPORT SynchronousMutationNotifier
   void notifyNodeChildrenWillBeRemoved(ContainerNode&);
   void notifyNodeWillBeRemoved(Node&);
 
+  void incrementSuppressorCount();
+  void decrementSuppressorCount();
+
  protected:
   SynchronousMutationNotifier();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SynchronousMutationNotifier);
+
+  void notifyUpdateCharacterDataImmediately(CharacterData*,
+                                            unsigned offset,
+                                            unsigned oldLength,
+                                            unsigned newLength);
+  void flushPendingCharacterDataUpdate();
+
+  int m_suppressorCount;
+
+  // Data for pending character data update
+  Member<CharacterData> m_pendingCharacterData;
+  unsigned m_pendingOffset;
+  unsigned m_pendingOldLength;
+  unsigned m_pendingNewLength;
 };
 
 }  // namespace dom