Add support for persisting CompositionUnderlines in InputMethodController

third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.h

Index: third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.h
diff --git a/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.h b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.h
index 8a4ecdc4eaadabfe8eabb428b13a5cf62c0f0468..2fd0cbe6ee5bf035aa9c7b44f29a5f69f8cc02de 100644
--- a/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.h
+++ b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.h
@@ -70,7 +70,8 @@ class CORE_EXPORT DocumentMarkerController final
                             const Position& end,
                             Color underlineColor,
                             bool thick,
-                            Color backgroundColor);
+                            Color backgroundColor,
+                            bool persist);
 
   void copyMarkers(Node* srcNode,
                    unsigned startOffset,
@@ -106,7 +107,7 @@ class CORE_EXPORT DocumentMarkerController final
   void removeMarkers(const MarkerRemoverPredicate& shouldRemoveMarker);
   void repaintMarkers(
       DocumentMarker::MarkerTypes = DocumentMarker::AllMarkers());
-  void shiftMarkers(Node*, unsigned startOffset, int delta);
+  void shiftMarkers(Node*, int startOffset, int prevLength, int newLength);
   // Returns true if markers within a range are found.
   bool setMarkersActive(const EphemeralRange&, bool);
   // Returns true if markers within a range defined by a node, |startOffset| and