Added the following 3 features to sample app.

Added the following 3 features to sample app.

1) Imported SKP files can now be run using the bbox playback ('b' key)
2) Imported SKP files are displayed using their basename
3) FPS counter has been updated to print time to draw all tiles

Committed: https://code.google.com/p/skia/source/detail?r=6718

[reed1, 2012-12-07 21:39:41]

you had me at 'features'

lgtm

[Leon, 2012-12-07 21:56:11]

lgtm