Add cmap 3,0 (symbol) as Unicode fallback.

tests/FontHostTest.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Resources.h"
 #include "SkEndian.h"
 #include "SkFontStream.h"
@@ skipping 135 matching lines @@
 
     int count = SkFontStream::CountTTCEntries(stream);
 #ifdef DUMP_TTC_TABLES
     SkDebugf("CountTTCEntries %d\n", count);
 #endif
     for (int i = 0; i < count; ++i) {
         test_fontstream(reporter, stream, i);
     }
 }
 
+static void test_symbolfont(skiatest::Reporter* reporter) {
+    SkAutoTUnref<SkTypeface> typeface(GetResourceAsTypeface("/fonts/SpiderSymbol.ttf"));
+    if (!typeface) {
+        SkDebugf("Skipping FontHostTest::test_symbolfont\n");
+        return;
+    }
+
+    SkUnichar c = 0xf021;
+    uint16_t g;
+    SkPaint paint;
+    paint.setTypeface(typeface);
+    paint.setTextEncoding(SkPaint::kUTF32_TextEncoding);
+    paint.textToGlyphs(&c, 4, &g);
+    REPORTER_ASSERT(reporter, g == 3);
+}
+
 static void test_tables(skiatest::Reporter* reporter, SkTypeface* face) {
     if (false) { // avoid bit rot, suppress warning
         SkFontID fontID = face->uniqueID();
         REPORTER_ASSERT(reporter, fontID);
     }
 
     int count = face->countTables();
 
     SkAutoTMalloc<SkFontTableTag> storage(count);
     SkFontTableTag* tags = storage.get();
@@ skipping 122 matching lines @@
                 REPORTER_ASSERT(reporter, width1 == width2);
             }
         }
     }
 }
 
 DEF_TEST(FontHost, reporter) {
     test_tables(reporter);
     test_fontstream(reporter);
     test_advances(reporter);
+    test_symbolfont(reporter);
 }
 
 // need tests for SkStrSearch