Provide framework-only timing information (#3699)
Provide framework-only timing information (#3699)

This makes it easier to generate charts that show the engine time and
the framework time separately.
Hixie/flutter,flutter/flutter,flutter/flutter,Hixie/flutter,Hixie/flutter,cbracken/flutter,turnidge/flutter,Hixie/flutter,cbracken/flutter,flutter/flutter,flutter/flutter,tvolkert/flutter,tvolkert/flutter,cbracken/flutter,turnidge/flutter,turnidge/flutter,cbracken/flutter,Hixie/flutter,cbracken/flutter,cbracken/flutter,flutter/flutter,turnidge/flutter,cbracken/flutter,Hixie/flutter,tvolkert/flutter,Hixie/flutter,aghassemi/flutter,Hixie/flutter,Hixie/flutter,cbracken/flutter,flutter/flutter,Hixie/flutter,tvolkert/flutter,flutter/flutter,tvolkert/flutter,flutter/flutter,tvolkert/flutter,aghassemi/flutter,aghassemi/flutter,tvolkert/flutter,flutter/flutter,turnidge/flutter,aghassemi/flutter,cbracken/flutter,tvolkert/flutter,cbracken/flutter,flutter/flutter,tvolkert/flutter,tvolkert/flutter