Initial error handling code

src/ports/SkGlobalInitialization_default.cpp

Index: src/ports/SkGlobalInitialization_default.cpp
diff --git a/src/ports/SkGlobalInitialization_default.cpp b/src/ports/SkGlobalInitialization_default.cpp
index 902ec64642afa63218bdf84f5e947d11d8a46892..ed7dd2dfd536d29db19fd5d0b2b59420cd7b5459 100644
--- a/src/ports/SkGlobalInitialization_default.cpp
+++ b/src/ports/SkGlobalInitialization_default.cpp
@@ -62,7 +62,11 @@
 #include "SkTileImageFilter.h"
 #include "SkXfermodeImageFilter.h"
 
-void SkFlattenable::InitializeFlattenables() {
+void SkFlattenable::InitializeFlattenablesIfNeeded() {
+    static bool initialized = false;
+    if (initialized) {
+        return;
+    }
 
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkAnnotation)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkAvoidXfermode)
@@ -121,4 +125,7 @@ void SkFlattenable::InitializeFlattenables() {
     SkLumaMaskXfermode::InitializeFlattenables();
     SkTableColorFilter::InitializeFlattenables();
     SkXfermode::InitializeFlattenables();
+
+    initialized = true;
 }
+