Revert of 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 2adadc8b3e421843c6326be00af2c24875f8b34f..56b13e4b84a0e5b09f433f12bf1c2d25a520b81a 100644
--- a/third_party/WebKit/Source/core/editing/VisibleSelection.h
+++ b/third_party/WebKit/Source/core/editing/VisibleSelection.h
@@ -205,6 +205,16 @@
 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&);