| Index: content/browser/compositor/software_output_device_mac.mm | 
| diff --git a/content/browser/compositor/software_output_device_mac.mm b/content/browser/compositor/software_output_device_mac.mm | 
| index 4fd799382da9bb2db606fb054d9d1cdc6244e311..9c9c393148019e653bd9beb3e915133657a4d467 100644 | 
| --- a/content/browser/compositor/software_output_device_mac.mm | 
| +++ b/content/browser/compositor/software_output_device_mac.mm | 
| @@ -141,7 +141,7 @@ void SoftwareOutputDeviceMac::EndPaint() { | 
| DLOG(ERROR) << "Failed to unlock IOSurface " << io_result; | 
| } | 
|  | 
| -  canvas_ = nullptr; | 
| +  canvas_.reset(); | 
| base::TimeTicks vsync_timebase; | 
| base::TimeDelta vsync_interval; | 
| ui::AcceleratedWidgetMacGotFrame( | 
|  |