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

Review URL: https://codereview.appspot.com/6904057

git-svn-id: http://skia.googlecode.com/svn/trunk@6718 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed