Move DocumentMarker related files to editing/markers/ from dom/

Source/core/core.gypi

Index: Source/core/core.gypi
diff --git a/Source/core/core.gypi b/Source/core/core.gypi
index 0521deb4a9054a6a03522f7007b0bfd093eca13e..3a6ab63f3369a37575eeb2459ef65c78ed1909c2 100644
--- a/Source/core/core.gypi
+++ b/Source/core/core.gypi
@@ -1288,6 +1288,10 @@
             'editing/DeleteFromTextNodeCommand.cpp',
             'editing/DeleteFromTextNodeCommand.h',
             'editing/DeleteSelectionCommand.cpp',
+            'editing/DocumentMarker.cpp',
+            'editing/DocumentMarker.h',
+            'editing/DocumentMarkerController.cpp',
+            'editing/DocumentMarkerController.h',
             'editing/DragCaretController.cpp',
             'editing/DragCaretController.h',
             'editing/EditCommand.cpp',
@@ -2245,8 +2249,6 @@
             'dom/DocumentLifecycleNotifier.cpp',
             'dom/DocumentLifecycleNotifier.h',
             'dom/DocumentLifecycleObserver.h',
-            'dom/DocumentMarker.cpp',
-            'dom/DocumentMarkerController.cpp',
             'dom/DocumentOrderedList.cpp',
             'dom/DocumentOrderedList.h',
             'dom/DocumentOrderedMap.cpp',
@@ -3724,7 +3726,6 @@
             'dom/AttrTest.cpp',
             'dom/CrossThreadTaskTest.cpp',
             'dom/DOMImplementationTest.cpp',
-            'dom/DocumentMarkerControllerTest.cpp',
             'dom/DocumentTest.cpp',
             'dom/MainThreadTaskRunnerTest.cpp',
             'dom/NthIndexCacheTest.cpp',
@@ -3736,6 +3737,7 @@
             'dom/TreeScopeTest.cpp',
             'dom/shadow/ComposedTreeTraversalTest.cpp',
             'editing/CompositionUnderlineRangeFilterTest.cpp',
+            'editing/DocumentMarkerControllerTest.cpp',
             'editing/EditingStrategyTest.cpp',
             'editing/EditingTestBase.cpp',
             'editing/EditingTestBase.h',