Rewrite DocumentMarkerController to use SynchronousMutationObserver

third_party/WebKit/Source/core/editing/commands/DeleteSelectionCommand.cpp

Index: third_party/WebKit/Source/core/editing/commands/DeleteSelectionCommand.cpp
diff --git a/third_party/WebKit/Source/core/editing/commands/DeleteSelectionCommand.cpp b/third_party/WebKit/Source/core/editing/commands/DeleteSelectionCommand.cpp
index cb59bcd592de2af76f90e967c1fe13a58baa7d8e..140473ac1aee7ded81f818fb2262597e96bd84c0 100644
--- a/third_party/WebKit/Source/core/editing/commands/DeleteSelectionCommand.cpp
+++ b/third_party/WebKit/Source/core/editing/commands/DeleteSelectionCommand.cpp
@@ -752,9 +752,9 @@ void DeleteSelectionCommand::fixupWhitespace() {
     DCHECK(!textNode->layoutObject() ||
            textNode->layoutObject()->style()->collapseWhiteSpace())
         << textNode;
-    replaceTextInNodePreservingMarkers(
-        textNode, m_leadingWhitespace.computeOffsetInContainerNode(), 1,
-        nonBreakingSpaceString());
+    replaceTextInNode(textNode,
+                      m_leadingWhitespace.computeOffsetInContainerNode(), 1,
+                      nonBreakingSpaceString());
   }
   if (m_trailingWhitespace.isNotNull() &&
       !isRenderedCharacter(m_trailingWhitespace) &&
@@ -763,9 +763,9 @@ void DeleteSelectionCommand::fixupWhitespace() {
     DCHECK(!textNode->layoutObject() ||
            textNode->layoutObject()->style()->collapseWhiteSpace())
         << textNode;
-    replaceTextInNodePreservingMarkers(
-        textNode, m_trailingWhitespace.computeOffsetInContainerNode(), 1,
-        nonBreakingSpaceString());
+    replaceTextInNode(textNode,
+                      m_trailingWhitespace.computeOffsetInContainerNode(), 1,
+                      nonBreakingSpaceString());
   }
 }