Add support for persisting CompositionUnderlines in InputMethodController

third_party/WebKit/Source/core/editing/markers/DocumentMarker.cpp

Index: third_party/WebKit/Source/core/editing/markers/DocumentMarker.cpp
diff --git a/third_party/WebKit/Source/core/editing/markers/DocumentMarker.cpp b/third_party/WebKit/Source/core/editing/markers/DocumentMarker.cpp
index eaf5c8ba476b638f4b47ec92aa1e3d7ec8de1a0b..9aceee0f0d56b4c91b6ad501f9f15e7be045a2fc 100644
--- a/third_party/WebKit/Source/core/editing/markers/DocumentMarker.cpp
+++ b/third_party/WebKit/Source/core/editing/markers/DocumentMarker.cpp
@@ -155,14 +155,19 @@ DocumentMarker::DocumentMarker(unsigned startOffset,
                                unsigned endOffset,
                                Color underlineColor,
                                bool thick,
-                               Color backgroundColor)
-    : m_type(DocumentMarker::Composition),
-      m_startOffset(startOffset),
+                               Color backgroundColor,
+                               bool persist)
+    : m_startOffset(startOffset),
       m_endOffset(endOffset),
       m_details(TextCompositionMarkerDetails::create(underlineColor,
                                                      thick,
                                                      backgroundColor)),
-      m_hash(0) {}
+      m_hash(0) {
+  if (persist)
+    m_type = DocumentMarker::PersistingComposition;
+  else
+    m_type = DocumentMarker::Composition;
+}
 
 DocumentMarker::DocumentMarker(const DocumentMarker& marker)
     : m_type(marker.type()),