| Index: cc/surfaces/primary_begin_frame_source.cc
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| diff --git a/cc/surfaces/primary_begin_frame_source.cc b/cc/surfaces/primary_begin_frame_source.cc
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| index 588dbfae67e07ba6d65c40d3376d75e14e2d37ac..900ec98f5be6e5edf63832d8aad3897fbc379ddf 100644
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| --- a/cc/surfaces/primary_begin_frame_source.cc
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| +++ b/cc/surfaces/primary_begin_frame_source.cc
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| @@ -52,9 +52,8 @@ const BeginFrameArgs& PrimaryBeginFrameSource::LastUsedBeginFrameArgs() const {
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|  
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|  void PrimaryBeginFrameSource::OnBeginFrameSourcePausedChanged(bool paused) {}
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|  
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| -void PrimaryBeginFrameSource::DidFinishFrame(BeginFrameObserver* obs,
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| -                                             const BeginFrameAck& ack) {
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| -  begin_frame_source_.DidFinishFrame(obs, ack);
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| +void PrimaryBeginFrameSource::DidFinishFrame(BeginFrameObserver* obs) {
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| +  begin_frame_source_.DidFinishFrame(obs);
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|  }
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|  
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|  void PrimaryBeginFrameSource::AddObserver(BeginFrameObserver* obs) {
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| 
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