Move SelectionAdjust to its own file

third_party/WebKit/Source/core/editing/VisibleSelection.h

Index: third_party/WebKit/Source/core/editing/VisibleSelection.h
diff --git a/third_party/WebKit/Source/core/editing/VisibleSelection.h b/third_party/WebKit/Source/core/editing/VisibleSelection.h
index 56b13e4b84a0e5b09f433f12bf1c2d25a520b81a..2adadc8b3e421843c6326be00af2c24875f8b34f 100644
--- a/third_party/WebKit/Source/core/editing/VisibleSelection.h
+++ b/third_party/WebKit/Source/core/editing/VisibleSelection.h
@@ -205,16 +205,6 @@ extern template class CORE_EXTERN_TEMPLATE_EXPORT VisibleSelectionTemplate<Editi
 using VisibleSelection = VisibleSelectionTemplate<EditingStrategy>;
 using VisibleSelectionInComposedTree = VisibleSelectionTemplate<EditingInComposedTreeStrategy>;
 
-// TODO(yosin): We should move |SelectionAdjuster| to its own file.
-class SelectionAdjuster final {
-    STATIC_ONLY(SelectionAdjuster);
-public:
-    static void adjustSelectionInComposedTree(VisibleSelectionInComposedTree*, const VisibleSelection&);
-    static void adjustSelectionInDOMTree(VisibleSelection*, const VisibleSelectionInComposedTree&);
-    static void adjustSelectionToAvoidCrossingShadowBoundaries(VisibleSelection*);
-    static void adjustSelectionToAvoidCrossingShadowBoundaries(VisibleSelectionInComposedTree*);
-};
-
 // TODO(yosin): We should use |operator==()| instead of
 // |equalSelectionsInDOMTree()|.
 bool equalSelectionsInDOMTree(const VisibleSelection&, const VisibleSelection&);