| Index: ui/display/display_observer.h
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| diff --git a/ui/display/display_observer.h b/ui/display/display_observer.h
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| index 5c6a53d74e3e413168691ff8c66745e4424bdfa1..a41e7068102b12b5a8a1413d171ffadeca7dfbfe 100644
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| --- a/ui/display/display_observer.h
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| +++ b/ui/display/display_observer.h
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| @@ -9,12 +9,8 @@
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|  
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|  #include "ui/display/display_export.h"
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|  
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| -namespace gfx {
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| -class Display;
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| -}
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| -
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|  namespace display {
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| -using Display = gfx::Display;
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| +class Display;
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|  
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|  // Observers for display configuration changes.
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|  // TODO(oshima): consolidate |WorkAreaWatcherObserver| and
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| 
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