Make FrameSelection to utilize SynchronousMutationObserver

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

Index: third_party/WebKit/Source/core/dom/CharacterData.cpp
diff --git a/third_party/WebKit/Source/core/dom/CharacterData.cpp b/third_party/WebKit/Source/core/dom/CharacterData.cpp
index 3024fd7737df8b0ddca23201883caeb624a27449..6605cf0cdcaffbe291a42eb3b2a1d79e8ff1868b 100644
--- a/third_party/WebKit/Source/core/dom/CharacterData.cpp
+++ b/third_party/WebKit/Source/core/dom/CharacterData.cpp
@@ -192,10 +192,6 @@ void CharacterData::setDataAndUpdate(const String& newData,
 
     document().notifyUpdateCharacterData(this, offsetOfReplacedData, oldLength,
                                          newLength);
-
-    if (document().frame())
-      document().frame()->selection().didUpdateCharacterData(
-          this, offsetOfReplacedData, oldLength, newLength);
   }
 
   document().incDOMTreeVersion();