Follow up to serialization validation code

src/core/SkScalerContext.cpp

Index: src/core/SkScalerContext.cpp
diff --git a/src/core/SkScalerContext.cpp b/src/core/SkScalerContext.cpp
index ee9d9194276228ac94edc103436462770ecfcfb7..a7168ba7b5dc97d02a38199e267411af3fdc27a2 100644
--- a/src/core/SkScalerContext.cpp
+++ b/src/core/SkScalerContext.cpp
@@ -66,14 +66,14 @@ void SkGlyph::zeroMetrics() {
     #define DUMP_RECx
 #endif
 
-static SkFlattenable* load_flattenable(const SkDescriptor* desc, uint32_t tag) {
-    SkFlattenable*  obj = NULL;
-    uint32_t        len;
-    const void*     data = desc->findEntry(tag, &len);
+template <typename T> T* load_flattenable(const SkDescriptor* desc, uint32_t tag) {
+    T*          obj = NULL;
+    uint32_t    len;
+    const void* data = desc->findEntry(tag, &len);
 
     if (data) {
         SkOrderedReadBuffer   buffer(data, len);
-        obj = buffer.readFlattenable();
+        obj = buffer.readFlattenableT<T>();
         SkASSERT(buffer.offset() == buffer.size());
     }
     return obj;
@@ -84,9 +84,9 @@ SkScalerContext::SkScalerContext(SkTypeface* typeface, const SkDescriptor* desc)
 
     , fBaseGlyphCount(0)
     , fTypeface(SkRef(typeface))
-    , fPathEffect(static_cast<SkPathEffect*>(load_flattenable(desc, kPathEffect_SkDescriptorTag)))
-    , fMaskFilter(static_cast<SkMaskFilter*>(load_flattenable(desc, kMaskFilter_SkDescriptorTag)))
-    , fRasterizer(static_cast<SkRasterizer*>(load_flattenable(desc, kRasterizer_SkDescriptorTag)))
+    , fPathEffect(load_flattenable<SkPathEffect>(desc, kPathEffect_SkDescriptorTag))
+    , fMaskFilter(load_flattenable<SkMaskFilter>(desc, kMaskFilter_SkDescriptorTag))
+    , fRasterizer(load_flattenable<SkRasterizer>(desc, kRasterizer_SkDescriptorTag))
 
       // Initialize based on our settings. Subclasses can also force this.
     , fGenerateImageFromPath(fRec.fFrameWidth > 0 || fPathEffect != NULL || fRasterizer != NULL)