Implement onGetTableTags and onGetTableData on Windows.

include/core/SkTypeface.h

Index: include/core/SkTypeface.h
===================================================================
--- include/core/SkTypeface.h	(revision 10497)
+++ include/core/SkTypeface.h	(working copy)
@@ -22,6 +22,7 @@
 class SkWStream;
 
 typedef uint32_t SkFontID;
+/** Machine endian. */
 typedef uint32_t SkFontTableTag;
 
 /** \class SkTypeface
@@ -294,16 +295,11 @@
 
     virtual int onGetUPEM() const = 0;
 
-    virtual int onGetTableTags(SkFontTableTag tags[]) const;
+    virtual int onGetTableTags(SkFontTableTag tags[]) const = 0;
     virtual size_t onGetTableData(SkFontTableTag, size_t offset,
-                                  size_t length, void* data) const;
+                                  size_t length, void* data) const = 0;
 
-    // TODO: make this pure-virtual when all ports have overridden it
-    virtual SkTypeface* onRefMatchingStyle(Style styleBits) const {
-        SkASSERT(0);
-        this->ref();
-        return const_cast<SkTypeface*>(this);
-    }
+    virtual SkTypeface* onRefMatchingStyle(Style styleBits) const = 0;
 
 private:
     SkFontID    fUniqueID;