remove confusing/unused stream methods

src/core/SkPaint.cpp

Index: src/core/SkPaint.cpp
diff --git a/src/core/SkPaint.cpp b/src/core/SkPaint.cpp
index 5d7c2cc3ebc4420b3ef5e027d291e2159d984a0a..1c2f8e83a6eba738ec542ac1f96808392556db8e 100644
--- a/src/core/SkPaint.cpp
+++ b/src/core/SkPaint.cpp
@@ -2307,17 +2307,20 @@ const SkRect& SkPaint::doComputeFastBounds(const SkRect& origSrc,
 }
 
 #ifndef SK_IGNORE_TO_STRING
+
+static SkFontDescriptor typeface_getDescriptor(const SkTypeface* face) {
+    SkDynamicMemoryWStream ostream;
+    face->serialize(&ostream);
+    SkAutoTUnref<SkStreamAsset> istream(ostream.detachAsStream());
+    return SkFontDescriptor(istream);
+}
+
 void SkPaint::toString(SkString* str) const {
     str->append("<dl><dt>SkPaint:</dt><dd><dl>");
 
     SkTypeface* typeface = this->getTypeface();
     if (typeface) {
-        SkDynamicMemoryWStream ostream;
-        typeface->serialize(&ostream);
-        SkAutoTUnref<SkData> data(ostream.copyToData());
-
-        SkMemoryStream stream(data);
-        SkFontDescriptor descriptor(&stream);
+        SkFontDescriptor descriptor(typeface_getDescriptor(typeface));
 
         str->append("<dt>Font Family Name:</dt><dd>");
         str->append(descriptor.getFamilyName());