Replace last remaining usage of WebURLLoaderClient::didFinishLoading(WebURLLoader*) with WebURLLoaderClient::didFinishLoading(WebURLLoader*, double), so that the former can be removed.
Replace last remaining usage of WebURLLoaderClient::didFinishLoading(WebURLLoader*)
with WebURLLoaderClient::didFinishLoading(WebURLLoader*, double), so that the
former can be removed.

BUG=None
TEST=compiles
Review URL: http://codereview.chromium.org/3573006

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@61206 0039d316-1c4b-4281-b951-d872f2087c98

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