Initial error handling code

src/core/SkScalerContext.cpp

Index: src/core/SkScalerContext.cpp
diff --git a/src/core/SkScalerContext.cpp b/src/core/SkScalerContext.cpp
index 83cf8f80064aaf2c9c043ba72a52939a4864c05e..88e3f06ee8390ee2e17c65a4d9c3f4dd0d6a6f85 100644
--- a/src/core/SkScalerContext.cpp
+++ b/src/core/SkScalerContext.cpp
@@ -67,14 +67,14 @@ void SkGlyph::zeroMetrics() {
 #endif
 
 static SkFlattenable* load_flattenable(const SkDescriptor* desc, uint32_t tag,
-                                       SkEffectType et) {
+                                       SkFlattenable::Type ft) {
     SkFlattenable*  obj = NULL;
     uint32_t        len;
     const void*     data = desc->findEntry(tag, &len);
-
+ 
     if (data) {
         SkOrderedReadBuffer   buffer(data, len);
-        obj = buffer.readFlattenable(et);
+        obj = buffer.readFlattenable(ft);
         SkASSERT(buffer.offset() == buffer.size());
     }
     return obj;
@@ -85,10 +85,12 @@ SkScalerContext::SkScalerContext(SkTypeface* typeface, const SkDescriptor* desc)
 
     , fBaseGlyphCount(0)
     , fTypeface(SkRef(typeface))
-    , fPathEffect(static_cast<SkPathEffect*>(load_flattenable(desc, kPathEffect_SkDescriptorTag, kPathEffect_SkEffectType)))
-    , fMaskFilter(static_cast<SkMaskFilter*>(load_flattenable(desc, kMaskFilter_SkDescriptorTag, kMaskFilter_SkEffectType)))
-    , fRasterizer(static_cast<SkRasterizer*>(load_flattenable(desc, kRasterizer_SkDescriptorTag, kRasterizer_SkEffectType)))
-
+    , fPathEffect(static_cast<SkPathEffect*>(load_flattenable(desc, kPathEffect_SkDescriptorTag,
+                                             SkFlattenable::kSkPathEffect_Type)))
+    , fMaskFilter(static_cast<SkMaskFilter*>(load_flattenable(desc, kMaskFilter_SkDescriptorTag,
+                                             SkFlattenable::kSkMaskFilter_Type)))
+    , fRasterizer(static_cast<SkRasterizer*>(load_flattenable(desc, kRasterizer_SkDescriptorTag,
+                                             SkFlattenable::kSkRasterizer_Type)))
       // Initialize based on our settings. Subclasses can also force this.
     , fGenerateImageFromPath(fRec.fFrameWidth > 0 || fPathEffect != NULL || fRasterizer != NULL)