Fix file paths in dromaeo tests
Fix file paths in dromaeo tests

Following https://codereview.chromium.org/24451002 the dromaeo tests
stopped running because:
1) The URL was of the form file:/// whereas a relative path is now
expected to be file://
2) navigate.py was stripping query and fragment off file URLs. These
are needed to control dromaeo.

BUG=308120
R=dtu@chromium.org

Review URL: https://codereview.chromium.org/27517004

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@228981 0039d316-1c4b-4281-b951-d872f2087c98

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