Make char hash dynamic when needed.

src/core/SkGlyphCache.h

Index: src/core/SkGlyphCache.h
diff --git a/src/core/SkGlyphCache.h b/src/core/SkGlyphCache.h
index bb34a7d977411784971c9658793ad787e7197237..1576425b076866e1be605b62511e654e8fab9d45 100644
--- a/src/core/SkGlyphCache.h
+++ b/src/core/SkGlyphCache.h
@@ -202,7 +202,10 @@ private:
         SkGlyph*    fGlyph;
     };
     // no reason to use the same kHashCount as fGlyphHash, but we do for now
-    CharGlyphRec    fCharToGlyphHash[kHashCount];
+    // Dynamically allocated when chars are encountered.
+    SkAutoTArray<CharGlyphRec> fCharToGlyphHash;
+    
+    CharGlyphRec* getCharGlyphRec(uint32_t id);
 
     static inline unsigned ID2HashIndex(uint32_t id) {
         id ^= id >> 16;