Move serializer related files in core/editing/ related files into core/editing/serializers/

Source/core/core.gypi

 {
     'includes': [
         'core_generated.gypi',
     ],
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/KeyframeEffect.idl',
             'animation/EffectModel.idl',
             'animation/AnimationEffectReadOnly.idl',
@@ skipping 1291 matching lines @@
             'editing/EditingUtilities.h',
             'editing/Editor.cpp',
             'editing/EditorCommand.cpp',
             'editing/EditorKeyBindings.cpp',
             'editing/EphemeralRange.cpp',
             'editing/EphemeralRange.h',
             'editing/FormatBlockCommand.cpp',
             'editing/FormatBlockCommand.h',
             'editing/FrameSelection.cpp',
             'editing/GranularityStrategy.cpp',
-            'editing/HTMLInterchange.cpp',
             'editing/IndentOutdentCommand.cpp',
             'editing/IndentOutdentCommand.h',
             'editing/InputMethodController.cpp',
             'editing/InputMethodController.h',
             'editing/InsertIntoTextNodeCommand.cpp',
             'editing/InsertIntoTextNodeCommand.h',
             'editing/InsertLineBreakCommand.cpp',
             'editing/InsertLineBreakCommand.h',
             'editing/InsertListCommand.cpp',
             'editing/InsertListCommand.h',
@@ skipping 13 matching lines @@
             'editing/iterators/TextIteratorTextState.cpp',
             'editing/iterators/TextIteratorTextState.h',
             'editing/iterators/CharacterIterator.cpp',
             'editing/iterators/SimplifiedBackwardsTextIterator.cpp',
             'editing/iterators/WordAwareIterator.cpp',
             'editing/markers/DocumentMarker.cpp',
             'editing/markers/DocumentMarker.h',
             'editing/markers/DocumentMarkerController.cpp',
             'editing/markers/DocumentMarkerController.h',
             'editing/markers/RenderedDocumentMarker.h',
-            'editing/MarkupAccumulator.cpp',
-            'editing/MarkupAccumulator.h',
-            'editing/MarkupFormatter.cpp',
-            'editing/MarkupFormatter.h',
             'editing/MergeIdenticalElementsCommand.cpp',
             'editing/MergeIdenticalElementsCommand.h',
             'editing/MoveSelectionCommand.cpp',
             'editing/PlainTextRange.cpp',
             'editing/PlainTextRange.h',
             'editing/Position.cpp',
             'editing/Position.h',
             'editing/PositionIterator.cpp',
             'editing/PositionIterator.h',
             'editing/PositionWithAffinity.cpp',
             'editing/PositionWithAffinity.h',
             'editing/RemoveCSSPropertyCommand.cpp',
             'editing/RemoveCSSPropertyCommand.h',
             'editing/RemoveFormatCommand.cpp',
             'editing/RemoveFormatCommand.h',
             'editing/RemoveNodeCommand.cpp',
             'editing/RemoveNodeCommand.h',
             'editing/RemoveNodePreservingChildrenCommand.cpp',
             'editing/RemoveNodePreservingChildrenCommand.h',
             'editing/RenderedPosition.cpp',
             'editing/RenderedPosition.h',
             'editing/ReplaceNodeWithSpanCommand.cpp',
             'editing/ReplaceNodeWithSpanCommand.h',
             'editing/ReplaceSelectionCommand.cpp',
             'editing/SelectionController.cpp',
             'editing/SelectionController.h',
             'editing/SelectionType.h',
-            'editing/Serialization.cpp',
-            'editing/Serialization.h',
             'editing/SetNodeAttributeCommand.cpp',
             'editing/SetNodeAttributeCommand.h',
             'editing/SimplifyMarkupCommand.cpp',
             'editing/SmartReplaceCF.cpp',
             'editing/SmartReplaceICU.cpp',
             'editing/SplitElementCommand.cpp',
             'editing/SplitElementCommand.h',
             'editing/SplitTextNodeCommand.cpp',
             'editing/SplitTextNodeCommand.h',
             'editing/SplitTextNodeContainingElementCommand.cpp',
             'editing/SplitTextNodeContainingElementCommand.h',
-            'editing/StyledMarkupAccumulator.cpp',
-            'editing/StyledMarkupAccumulator.h',
-            'editing/StyledMarkupSerializer.cpp',
-            'editing/StyledMarkupSerializer.h',
             'editing/SurroundingText.cpp',
             'editing/SurroundingText.h',
             'editing/TextInsertionBaseCommand.cpp',
             'editing/TextInsertionBaseCommand.h',
-            'editing/TextOffset.cpp',
-            'editing/TextOffset.h',
             'editing/TypingCommand.cpp',
             'editing/UndoStack.cpp',
             'editing/UndoStack.h',
             'editing/UndoStep.h',
             'editing/UnlinkCommand.cpp',
             'editing/UnlinkCommand.h',
             'editing/VisiblePosition.cpp',
             'editing/VisibleSelection.cpp',
             'editing/VisibleUnits.cpp',
             'editing/WrapContentsInDummySpanCommand.cpp',
             'editing/WrapContentsInDummySpanCommand.h',
+            'editing/serializers/HTMLInterchange.cpp',
+            'editing/serializers/HTMLInterchange.h',
+            'editing/serializers/MarkupAccumulator.cpp',
+            'editing/serializers/MarkupAccumulator.h',
+            'editing/serializers/MarkupFormatter.cpp',
+            'editing/serializers/MarkupFormatter.h',
+            'editing/serializers/Serialization.cpp',
+            'editing/serializers/Serialization.h',
+            'editing/serializers/StyledMarkupAccumulator.cpp',
+            'editing/serializers/StyledMarkupAccumulator.h',
+            'editing/serializers/StyledMarkupSerializer.cpp',
+            'editing/serializers/StyledMarkupSerializer.h',
+            'editing/serializers/TextOffset.cpp',
+            'editing/serializers/TextOffset.h',
             'editing/spellcheck/SpellCheckRequester.cpp',
             'editing/spellcheck/SpellCheckRequester.h',
             'editing/spellcheck/SpellChecker.cpp',
             'editing/spellcheck/SpellChecker.h',
             'editing/spellcheck/TextCheckingHelper.cpp',
             'editing/spellcheck/TextCheckingHelper.h',
             'fetch/AccessControlStatus.h',
             'fetch/CSSStyleSheetResource.cpp',
             'fetch/CSSStyleSheetResource.h',
             'fetch/CachedMetadata.h',
@@ skipping 2325 matching lines @@
             'editing/EditingTestBase.cpp',
             'editing/EditingTestBase.h',
             'editing/FrameSelectionTest.cpp',
             'editing/GranularityStrategyTest.cpp',
             'editing/InputMethodControllerTest.cpp',
             'editing/iterators/CharacterIteratorTest.cpp',
             'editing/iterators/SearchBufferTest.cpp',
             'editing/iterators/TextIteratorTest.cpp',
             'editing/markers/DocumentMarkerControllerTest.cpp',
             'editing/PositionTest.cpp',
-            'editing/StyledMarkupSerializerTest.cpp',
             'editing/SurroundingTextTest.cpp',
             'editing/VisiblePositionTest.cpp',
             'editing/VisibleSelectionTest.cpp',
             'editing/VisibleUnitsTest.cpp',
+            'editing/serializers/StyledMarkupSerializerTest.cpp',
             'events/EventPathTest.cpp',
             'fetch/CachingCorrectnessTest.cpp',
             'fetch/ClientHintsPreferencesTest.cpp',
             'fetch/ImageResourceTest.cpp',
             'fetch/MemoryCacheTest.cpp',
             'fetch/RawResourceTest.cpp',
             'fetch/ResourceFetcherTest.cpp',
             'fetch/ResourceLoaderOptionsTest.cpp',
             'fetch/ResourceTest.cpp',
             'fileapi/FileListTest.cpp',
@@ skipping 59 matching lines @@
             'style/OutlineValueTest.cpp',
             'style/SVGComputedStyleTest.cpp',
             'svg/UnsafeSVGAttributeSanitizationTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'timing/MemoryInfoTest.cpp',
             'workers/WorkerThreadTest.cpp',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }