Enabling validation code in serialization and adding serialization to fuzzer

src/core/SkValidatingReadBuffer.cpp

Index: src/core/SkValidatingReadBuffer.cpp
diff --git a/src/core/SkValidatingReadBuffer.cpp b/src/core/SkValidatingReadBuffer.cpp
index a0e1a4179f2cd18ff431203aa8b1091102a68ec7..323273d131a25d80a84d0aa671aea023f1c9f501 100644
--- a/src/core/SkValidatingReadBuffer.cpp
+++ b/src/core/SkValidatingReadBuffer.cpp
@@ -11,10 +11,9 @@
 #include "SkStream.h"
 #include "SkTypeface.h"
 
-SkValidatingReadBuffer::SkValidatingReadBuffer(const void* data, size_t size) {
+SkValidatingReadBuffer::SkValidatingReadBuffer(const void* data, size_t size) :
+    fError(false) {
     this->setMemory(data, size);
-    fError = false;
-
     this->setFlags(SkFlattenableReadBuffer::kValidation_Flag);
 }