Check in the pristine copy of ICU 4.6...

Check in the pristine copy of ICU 4.6

The following directories we don't use are removed:

   as_is
   packaging
   source/extra
   source/sample
   source/layout
   source/layoutex

We need 4.6 for IDN update among other things.

We'll apply some patches on top of this. Once we're done, we'll
turn the 'knob' in DEPS file to use this instead of ICU 4.2.1

BUG=61514
TEST=NONE (yet)




Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=68397