Move LeftPositionOf() and RightPositionOf() to SelectionModifierCharacter.cpp

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

Index: third_party/WebKit/Source/core/editing/VisibleUnits.h
diff --git a/third_party/WebKit/Source/core/editing/VisibleUnits.h b/third_party/WebKit/Source/core/editing/VisibleUnits.h
index e56dcb764702d0f454347162909dfb62a26a93c3..532ff463e39fb55232bb62d8d03a4ed2b25c7ce2 100644
--- a/third_party/WebKit/Source/core/editing/VisibleUnits.h
+++ b/third_party/WebKit/Source/core/editing/VisibleUnits.h
@@ -130,19 +130,6 @@ CORE_EXPORT UChar32 CharacterAfter(const VisiblePositionInFlatTree&);
 CORE_EXPORT UChar32 CharacterBefore(const VisiblePosition&);
 CORE_EXPORT UChar32 CharacterBefore(const VisiblePositionInFlatTree&);
 
-// TODO(yosin) Since return value of |leftPositionOf()| with |VisiblePosition|
-// isn't defined well on flat tree, we should not use it for a position in
-// flat tree.
-CORE_EXPORT VisiblePosition LeftPositionOf(const VisiblePosition&);
-CORE_EXPORT VisiblePositionInFlatTree
-LeftPositionOf(const VisiblePositionInFlatTree&);
-// TODO(yosin) Since return value of |rightPositionOf()| with |VisiblePosition|
-// isn't defined well on flat tree, we should not use it for a position in
-// flat tree.
-CORE_EXPORT VisiblePosition RightPositionOf(const VisiblePosition&);
-CORE_EXPORT VisiblePositionInFlatTree
-RightPositionOf(const VisiblePositionInFlatTree&);
-
 CORE_EXPORT VisiblePosition
 NextPositionOf(const VisiblePosition&,
                EditingBoundaryCrossingRule = kCanCrossEditingBoundary);
@@ -377,6 +364,10 @@ VisiblePositionInFlatTree HonorEditingBoundaryAtOrAfter(
 VisiblePosition HonorEditingBoundaryAtOrBefore(const VisiblePosition&,
                                                const Position&);
 
+VisiblePositionInFlatTree HonorEditingBoundaryAtOrBefore(
+    const VisiblePositionInFlatTree&,
+    const PositionInFlatTree&);
+
 Position NextRootInlineBoxCandidatePosition(Node*,
                                             const VisiblePosition&,
                                             EditableType);