LeakExpectations: mark svg fonts leaks as false-positives

LeakExpectations: mark svg fonts leaks as false-positives

HarfBuzzRunCache is a global cache with entries holding |Font| which indirectly hold strong ref to |SVGFontFace|.
In future, the leak detector should clear the cache before counting number of |Document|s.

These "leaks" disappear if following line is commented out:
WebKit/Source/platform/fonts/harfbuzz/HarfBuzzShaper.cpp
861         runCache.insert(key, new CachedShapingResults(harfBuzzBuffer.get(), m_font, props.direction, localeString));

BUG=366455
TBR=haraken
NOTRY=true

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=176490

[kouhei (in TOK), 2014-06-19 05:11:25]

+haraken

[kouhei (in TOK), 2014-06-19 05:15:50]

The CQ bit was checked by kouhei@chromium.org

[commit-bot: I haz the power, 2014-06-19 05:16:26]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/kouhei@chromium.org/342153002/20001

[commit-bot: I haz the power, 2014-06-19 05:16:49]

Change committed as 176490

[haraken, 2014-06-19 05:21:33]

LGTM