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* Give it its own copy of its test data, instead of sharing with other
unrelated tests that live in src/chrome.
* Introduce ChromeComponentExtensionResourceManagerTest to address a TODO
and eliminate the src/chrome dependency.

BUG=397164
TEST=unit_tests, extensions_unittests

Review URL: https://codereview.chromium.org/439023002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287885 0039d316-1c4b-4281-b951-d872f2087c98