| Index: third_party/WebKit/Source/core/frame/FrameView.h
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| diff --git a/third_party/WebKit/Source/core/frame/FrameView.h b/third_party/WebKit/Source/core/frame/FrameView.h
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| index c941a207309c31d196c3e396ede51e864438776d..b07546a6bf4dd190c9e3cf0bfa2ad4a15e8d81e7 100644
 | 
| --- a/third_party/WebKit/Source/core/frame/FrameView.h
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| +++ b/third_party/WebKit/Source/core/frame/FrameView.h
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| @@ -761,6 +761,8 @@
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|    void updateScrollbars();
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|    void updateScrollbarsIfNeeded();
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|  
 | 
| +  void didChangeScrollbarsHidden() override;
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| +
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|    class InUpdateScrollbarsScope {
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|      STACK_ALLOCATED();
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|  
 | 
| 
 |