Try a different arbitrary SkGlyphCache cap (64 -> 256)

We're hitting a lot of crashes in skia::CreateCanvas that may be due to GDI
handle exhaustion.  This picks a different arbitrary limit for the number
of entries in this cache to try to see if the crashes are correlated. Changing
this cap from 2048->64 was perf neutral on the bots, so 64->256 is also
expected to be neutral.

TBR=reed
NOTRY=true
BUG=275046,314387

Review URL: https://codereview.chromium.org/71043002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234702 0039d316-1c4b-4281-b951-d872f2087c98

skia/skia_library.gypi

@@ -441,7 +441,7 @@
     'SK_DEFAULT_FONT_CACHE_LIMIT=<(default_font_cache_limit)',
 
      # http://crbug.com/314387
-    'SK_DEFAULT_FONT_CACHE_COUNT_LIMIT=64',
+    'SK_DEFAULT_FONT_CACHE_COUNT_LIMIT=256',
   ],
 
   'direct_dependent_settings': {