Use registered protocol handlers at startup.
Use registered protocol handlers at startup.

At startup we check the protocol handlers from the profile for urls passed in on the cmd line,

BUG=73710
TEST=Manual

Review URL: http://codereview.chromium.org/7071011
Patch from Ben Wells <benwells@chromium.org>.

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@87262 0039d316-1c4b-4281-b951-d872f2087c98

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