Clean up use of printf() in Layout.cpp.
Clean up use of printf() in Layout.cpp.

Reported externally at https://code.google.com/p/android/issues/detail?id=167715.
Bug: 21498085

Change-Id: I73f22de03b0151ce31a6b3070d051a2a701b33d2

devoncarew/engine,rmacnak-google/engine,tvolkert/engine,devoncarew/sky_engine,rmacnak-google/engine,Hixie/sky_engine,jamesr/flutter_engine,devoncarew/engine,cdotstout/sky_engine,cdotstout/sky_engine,jason-simmons/flutter_engine,jamesr/sky_engine,jamesr/sky_engine,Hixie/sky_engine,aam/engine,aam/engine,rmacnak-google/engine,jason-simmons/sky_engine,cdotstout/sky_engine,cdotstout/sky_engine,jason-simmons/sky_engine,chinmaygarde/sky_engine,tvolkert/engine,jason-simmons/sky_engine,chinmaygarde/flutter_engine,jason-simmons/flutter_engine,aam/engine,cdotstout/sky_engine,devoncarew/sky_engine,jamesr/sky_engine,aam/engine,devoncarew/engine,rmacnak-google/engine,Hixie/sky_engine,devoncarew/sky_engine,krisgiesing/sky_engine,jamesr/sky_engine,flutter/engine,devoncarew/engine,jason-simmons/flutter_engine,krisgiesing/sky_engine,devoncarew/sky_engine,krisgiesing/sky_engine,rmacnak-google/engine,rmacnak-google/engine,tvolkert/engine,jamesr/sky_engine,Hixie/sky_engine,flutter/engine,jason-simmons/sky_engine,aam/engine,devoncarew/sky_engine,mikejurka/engine,jamesr/sky_engine,Hixie/sky_engine,krisgiesing/sky_engine,jamesr/flutter_engine,chinmaygarde/flutter_engine,chinmaygarde/sky_engine,flutter/engine,jason-simmons/sky_engine,chinmaygarde/flutter_engine,rmacnak-google/engine,tvolkert/engine,tvolkert/engine,chinmaygarde/sky_engine,jason-simmons/flutter_engine,aam/engine,devoncarew/engine,tvolkert/engine,jason-simmons/flutter_engine,jamesr/flutter_engine,chinmaygarde/sky_engine,jason-simmons/sky_engine,mikejurka/engine,chinmaygarde/flutter_engine,devoncarew/sky_engine,flutter/engine,chinmaygarde/flutter_engine,chinmaygarde/sky_engine,flutter/engine,jamesr/sky_engine,mikejurka/engine,mikejurka/engine,chinmaygarde/sky_engine,Hixie/sky_engine,krisgiesing/sky_engine,jason-simmons/flutter_engine,jason-simmons/sky_engine,flutter/engine,krisgiesing/sky_engine,devoncarew/engine,jason-simmons/flutter_engine,chinmaygarde/flutter_engine,mikejurka/engine,jamesr/flutter_engine,flutter/engine,jamesr/flutter_engine,chinmaygarde/sky_engine,flutter/engine,mikejurka/engine,jamesr/flutter_engine,jamesr/flutter_engine,aam/engine,aam/engine,devoncarew/sky_engine,chinmaygarde/flutter_engine,jamesr/flutter_engine,mikejurka/engine,cdotstout/sky_engine,mikejurka/engine,krisgiesing/sky_engine,tvolkert/engine,mikejurka/engine,cdotstout/sky_engine,Hixie/sky_engine,Hixie/sky_engine,devoncarew/engine,jamesr/flutter_engine,jason-simmons/flutter_engine