Revert 89178 - Create a browser feature extractor that runs after the renderer has

Revert 89178 - Create a browser feature extractor that runs after the renderer has
decided that a page is phishing according to the extracted features
in the renderer.  For now we don't use these features in the classification.
We only use them on the server side.

Currently, the browser feature extractor extracts a bunch of features based
on the history service (e.g., has the user seen this URL before).

BUG=None
TEST=BrowserFeatureExtractorTest


Review URL: http://codereview.chromium.org/7119003

TBR=noelutz@google.com
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=89205