Strip font name of special characters before dumping

The font name can contain special characters in some OS that is
considered as delimiters ('/') by the traces. This causes error in the
dump name. This CL strips the fone name obtained before adding it to
traces.

This also adds discardable memory size for resources in cache.

BUG=532838

Review URL: https://codereview.chromium.org/1346993006
2 files changed