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+ Update chrome://kill and chrome://crash icons. Both now use the same icon.
+ Make layout consistent with the SSL / Malware / net error set of interstitials.
+ Switched colours, margin, padding to use native UI constants.

BUG=457763

Review URL: https://codereview.chromium.org/1129513002

Cr-Commit-Position: refs/heads/master@{#330724}