In chromedriver, add /log handler

In chromedriver, add /log url to get the contents of the chromedriver log
remotely. Also add a 'chrome.verbose' boolean startup option.
Remove usage of VLOG(1) in chromedriver. We do not need as complicated
logging as in Chrome.
BUG=85241
TEST=none

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=88591

[kkania, 2011-06-09 14:38:59]

Same as last CL; it got reverted because dispatch.cc:92 clang was upset about
comparing an unsigned and signed integer

I wonder why the commit bot didn't detect that...

[kkania, 2011-06-09 14:39:41]

Well, not exactly the same; I changed the constant in dispatch.cc to be unsigned

[Huyen, 2011-06-09 17:47:38]

Assuming everything else remained the same from last CL except for change in
dispatch.cc, LGTM.

[commit-bot: I haz the power, 2011-06-09 21:20:21]

Change committed as 88591