chromium: update to 21.0.1180.88 (important)

Chromium was updated to 21.0.1180.88 to fix various bugs
and security issues. Security fixes and rewards:

Please see the Chromium security
page<<a href=“http://sites.google.com/a/chromium.org/dev/Home/chromiu”>http://sites.google.com/a/chromium.org/dev/Home/chromiu</a>
m-security>for more detail. Note that the referenced bugs
may be kept private until a majority of our users are up to
date with the fix.

• [$500]
  [121347<<a href=“https://code.google.com/p/chromium/issues/detail?id=”>https://code.google.com/p/chromium/issues/detail?id=</a>
  121347>] Medium CVE-2012-2865: Out-of-bounds read in line
  breaking. Credit to miaubiz.
• [$1000]
  [134897<<a href=“https://code.google.com/p/chromium/issues/detail?id=”>https://code.google.com/p/chromium/issues/detail?id=</a>
  134897>] High CVE-2012-2866: Bad cast with run-ins. Credit
  to miaubiz.
• [135485
  <<a href=“https://code.google.com/p/chromium/issues/detail?id=135485”>https://code.google.com/p/chromium/issues/detail?id=135485</a>>
  ] Low CVE-2012-2867: Browser crash with SPDY.
• [$500]
  [136881<<a href=“https://code.google.com/p/chromium/issues/detail?id=”>https://code.google.com/p/chromium/issues/detail?id=</a>
  136881>] Medium CVE-2012-2868: Race condition with workers
  and XHR. Credit to miaubiz.
• [137778
  <<a href=“https://code.google.com/p/chromium/issues/detail?id=137778”>https://code.google.com/p/chromium/issues/detail?id=137778</a>>
  ] High CVE-2012-2869: Avoid stale buffer in URL loading.
  Credit to Fermin Serna of the Google Security Team.
• [138672
  <<a href=“https://code.google.com/p/chromium/issues/detail?id=138672”>https://code.google.com/p/chromium/issues/detail?id=138672</a>>
  ] [ 140368
  <<a href=“https://code.google.com/p/chromium/issues/detail?id=140368”>https://code.google.com/p/chromium/issues/detail?id=140368</a>>
  ] LowCVE-2012-2870: Lower severity memory management issues
  in XPath. Credit to Nicolas Gregoire.
• [$1000]
  [138673<<a href=“https://code.google.com/p/chromium/issues/detail?id=”>https://code.google.com/p/chromium/issues/detail?id=</a>
  138673>] High CVE-2012-2871: Bad cast in XSL transforms.
  Credit to Nicolas Gregoire.
• [$500]
  [142956<<a href=“https://code.google.com/p/chromium/issues/detail?id=”>https://code.google.com/p/chromium/issues/detail?id=</a>
  142956>] Medium CVE-2012-2872: XSS in SSL interstitial.
  Credit to Emmanuel Bronshtein.