Separate LineBreaker from RenderBlockLineLayout

Source/core/core.gypi

 {
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'css/CSS.idl',
             'css/CSSCharsetRule.idl',
             'css/CSSFontFaceLoadEvent.idl',
             'css/CSSFontFaceRule.idl',
             'css/CSSImportRule.idl',
             'css/CSSKeyframeRule.idl',
@@ skipping 1569 matching lines @@
             'rendering/SubtreeLayoutScope.h',
             'rendering/TableLayout.h',
             'rendering/TextAutosizer.cpp',
             'rendering/TextAutosizer.h',
             'rendering/TrailingFloatsRootInlineBox.h',
             'rendering/VerticalPositionCache.h',
             'rendering/animation/WebAnimationProvider.cpp',
             'rendering/animation/WebAnimationProvider.h',
             'rendering/break_lines.cpp',
             'rendering/break_lines.h',
+            'rendering/line/BreakingContext.cpp',
+            'rendering/line/LineBreaker.cpp',
+            'rendering/line/LineBreaker.h',
             'rendering/line/LineWidth.cpp',
             'rendering/line/LineWidth.h',
             'rendering/line/TrailingObjects.h',
             'rendering/line/TrailingObjects.cpp',
             'rendering/shapes/BoxShape.cpp',
             'rendering/shapes/BoxShape.h',
             'rendering/shapes/PolygonShape.cpp',
             'rendering/shapes/PolygonShape.h',
             'rendering/shapes/RasterShape.cpp',
             'rendering/shapes/RasterShape.h',
@@ skipping 1660 matching lines @@
             'html/track/vtt/BufferedLineReaderTest.cpp',
             'html/track/vtt/VTTScannerTest.cpp',
             'frame/ImageBitmapTest.cpp',
             'rendering/RenderOverflowTest.cpp',
             'rendering/shapes/BoxShapeTest.cpp',
             'testing/UnitTestHelpers.h',
             'testing/UnitTestHelpers.cpp',
         ],
     }
 }