Add onGetFamilyName to SkTypeface.

src/core/SkTypeface.cpp

 /*
  * Copyright 2011 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkAdvancedTypefaceMetrics.h"
 #include "SkEndian.h"
 #include "SkFontDescriptor.h"
@@ skipping 49 matching lines @@
             sk_bzero(glyphs, glyphCount * sizeof(glyphs[0]));
         }
         return 0;
     }
     virtual int onCountGlyphs() const SK_OVERRIDE { return 0; };
     virtual int onGetUPEM() const SK_OVERRIDE { return 0; };
     class EmptyLocalizedStrings : public SkTypeface::LocalizedStrings {
     public:
         virtual bool next(SkTypeface::LocalizedString*) SK_OVERRIDE { return false; }
     };
+    virtual void onGetFamilyName(SkString* familyName) const SK_OVERRIDE {
+        familyName->reset();
+    }
     virtual SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const SK_OVERRIDE {
         return SkNEW(EmptyLocalizedStrings);
     };
     virtual int onGetTableTags(SkFontTableTag tags[]) const SK_OVERRIDE { return 0; }
     virtual size_t onGetTableData(SkFontTableTag, size_t, size_t, void*) const SK_OVERRIDE {
         return 0;
     }
 };
 
 SK_DECLARE_STATIC_MUTEX(gCreateDefaultMutex);
@@ skipping 186 matching lines @@
         SkASSERT(NULL == adjustments);
     }
     return this->onGetKerningPairAdjustments(glyphs, count, adjustments);
 }
 
 SkTypeface::LocalizedStrings* SkTypeface::createFamilyNameIterator() const {
     return this->onCreateFamilyNameIterator();
 }
 
 void SkTypeface::getFamilyName(SkString* name) const {
-    bool isLocal = false;
-    SkFontDescriptor desc(this->style());
-    this->onGetFontDescriptor(&desc, &isLocal);
-    name->set(desc.getFamilyName());
+    SkASSERT(name);
+    this->onGetFamilyName(name);
 }
 
 SkAdvancedTypefaceMetrics* SkTypeface::getAdvancedTypefaceMetrics(
                                 SkAdvancedTypefaceMetrics::PerGlyphInfo info,
                                 const uint32_t* glyphIDs,
                                 uint32_t glyphIDsCount) const {
     SkAdvancedTypefaceMetrics* result =
             this->onGetAdvancedTypefaceMetrics(info, glyphIDs, glyphIDsCount);
     if (result && result->fType == SkAdvancedTypefaceMetrics::kTrueType_Font) {
         struct SkOTTableOS2 os2table;
@@ skipping 16 matching lines @@
     }
     return result;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 bool SkTypeface::onGetKerningPairAdjustments(const uint16_t glyphs[], int count,
                                              int32_t adjustments[]) const {
     return false;
 }