Move LayoutObject::nextOffset/previousOffset() to editing utility

third_party/WebKit/Source/core/layout/api/LineLayoutItem.h

Index: third_party/WebKit/Source/core/layout/api/LineLayoutItem.h
diff --git a/third_party/WebKit/Source/core/layout/api/LineLayoutItem.h b/third_party/WebKit/Source/core/layout/api/LineLayoutItem.h
index 4a87e2e51d3e43f62b73026d67fa50b772e66a18..cf132a15daf8b3796cda3d6556b6528f416e03bd 100644
--- a/third_party/WebKit/Source/core/layout/api/LineLayoutItem.h
+++ b/third_party/WebKit/Source/core/layout/api/LineLayoutItem.h
@@ -390,16 +390,6 @@ public:
         return m_layoutObject->localToAbsoluteQuad(quad, mode, wasFixed);
     }
 
-    int previousOffset(int current) const
-    {
-        return m_layoutObject->previousOffset(current);
-    }
-
-    int nextOffset(int current) const
-    {
-        return m_layoutObject->nextOffset(current);
-    }
-
     FloatPoint localToAbsolute(const FloatPoint& localPoint = FloatPoint(), MapCoordinatesFlags flags = 0) const
     {
         return m_layoutObject->localToAbsolute(localPoint, flags);