remove tracking code, as it polutes the code readability. Should be added back, in a less eficient …

remove tracking code, as it polutes the code readability. Should be added back, in a less eficient way, by registering streams instead, so we don't have to pass arround the streams, and the code will be cleaner.

Committed: https://code.google.com/p/skia/source/detail?r=11671

[edisonn, 2013-10-09 15:13:23]

Committed patchset #1 manually as r11671 (presubmit successful).