Make the browser survive massive data: URIs, via various techniques:...

Make the browser survive massive data: URIs, via various techniques:
1) Drop the URL limit from 10MB to 2MB. The browser survives without this,
but that final tweaks makes the whole data: URI attack fairly smooth (on my
admittedly powerful machine).
2) Elide the title string at kMaxTitleChars. We already have a hard title limit
but there was a path whereby the title is implied by the URL (e.g. file: and
data: etc).
3) For massive URLs, limit the length shown in URL bar. We need to support them,
because someone might redirect to a data: URI with e.g. an image in it.
However, attempting to show them would kill the browser. We can't elide them
because eliding URLs is a security risk (and would lead to correctness issues
with an edit/press enter cycle). So we show at least the origin (minus path) or
just the scheme for data: URIs


BUG=33952
TEST=NONE


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=43319

[Chris Evans, 2010-03-31 23:17:42]

Justin, can you look over this whilst the try bots ponder it? :)

[jschuh, 2010-03-31 23:44:40]

LGTM

[inferno, 2010-04-01 00:35:24]

LGTM. thanks chris for preserving the url origin.