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This CL creates two subclasses of FastNavigationProfileExtender:
CookieProfileExtender and HistoryProfilerExtender. The former performs up to
500 navigations, with the goal of filling up the Cookie Database but not
overfilling it (which is possible, unfortunately). The latter performs a large
number ~20,000 navigations to URIs pointing at the local file system to fill up
the History Database.

The run these profile extenders, this CL adds the class LargeProfileCreator.
This new class intentionally contains minimal logic, since the existing
profile_creator.py file is pretty hacky, and the goal is to eventually move
away from it entirely.

BUG=442546

Review URL: https://codereview.chromium.org/914253005

Cr-Commit-Position: refs/heads/master@{#317112}