| Index: cc/scheduler/scheduler_state_machine.cc
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| diff --git a/cc/scheduler/scheduler_state_machine.cc b/cc/scheduler/scheduler_state_machine.cc
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| index 947637ddb0e86551714d4c741ef80ad37a689caa..5b87b18ef31e94158ccd21643674ce52ff38735e 100644
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| --- a/cc/scheduler/scheduler_state_machine.cc
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| +++ b/cc/scheduler/scheduler_state_machine.cc
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| @@ -1038,6 +1038,12 @@ void SchedulerStateMachine::DidDrawIfPossibleCompleted(
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|      case DrawSwapReadbackResult::INVALID_RESULT:
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|        NOTREACHED() << "Uninitialized DrawSwapReadbackResult.";
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|        break;
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| +    case DrawSwapReadbackResult::DRAW_ABORTED_CANT_DRAW:
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| +    case DrawSwapReadbackResult::DRAW_ABORTED_CANT_READBACK:
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| +    case DrawSwapReadbackResult::DRAW_ABORTED_CONTEXT_LOST:
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| +      NOTREACHED() << "Invalid return value from DrawAndSwapIfPossible:"
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| +                   << result;
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| +      break;
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|      case DrawSwapReadbackResult::DRAW_SUCCESS:
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|        consecutive_checkerboard_animations_ = 0;
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|        forced_redraw_state_ = FORCED_REDRAW_STATE_IDLE;
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| 
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