| Index: third_party/WebKit/Source/core/layout/BUILD.gn
 | 
| diff --git a/third_party/WebKit/Source/core/layout/BUILD.gn b/third_party/WebKit/Source/core/layout/BUILD.gn
 | 
| index 7896fcc6da983e0828c78a761f3505c26a24c00d..556b3bcb2161904229c0363394fd7aeec2c1cbcf 100644
 | 
| --- a/third_party/WebKit/Source/core/layout/BUILD.gn
 | 
| +++ b/third_party/WebKit/Source/core/layout/BUILD.gn
 | 
| @@ -347,6 +347,8 @@ blink_core_sources("layout") {
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|      "ng/ng_box_fragment.cc",
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|      "ng/ng_box_fragment.h",
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|      "ng/ng_break_token.h",
 | 
| +    "ng/ng_column_layout_algorithm.cc",
 | 
| +    "ng/ng_column_layout_algorithm.h",
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|      "ng/ng_constraint_space.cc",
 | 
|      "ng/ng_constraint_space.h",
 | 
|      "ng/ng_constraint_space_builder.cc",
 | 
| 
 |