Simplify flattening to just write enough to call the factory

src/effects/SkTableMaskFilter.cpp

Index: src/effects/SkTableMaskFilter.cpp
diff --git a/src/effects/SkTableMaskFilter.cpp b/src/effects/SkTableMaskFilter.cpp
index 602302e503c0c3e5fe9b7f4b408c4e277baf8da3..42b4ab6ff6d41cbdc3b613878cb0b7c17be0fcc3 100644
--- a/src/effects/SkTableMaskFilter.cpp
+++ b/src/effects/SkTableMaskFilter.cpp
@@ -71,15 +71,23 @@ SkMask::Format SkTableMaskFilter::getFormat() const {
 }
 
 void SkTableMaskFilter::flatten(SkWriteBuffer& wb) const {
-    this->INHERITED::flatten(wb);
     wb.writeByteArray(fTable, 256);
 }
 
-SkTableMaskFilter::SkTableMaskFilter(SkReadBuffer& rb)
-        : INHERITED(rb) {
+SkFlattenable* SkTableMaskFilter::CreateProc(SkReadBuffer& buffer) {
+    uint8_t table[256];
+    if (!buffer.readByteArray(table, 256)) {
+        return NULL;
+    }
+    return Create(table);
+}
+
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+SkTableMaskFilter::SkTableMaskFilter(SkReadBuffer& rb) : INHERITED(rb) {
     SkASSERT(256 == rb.getArrayCount());
     rb.readByteArray(fTable, 256);
 }
+#endif
 
 ///////////////////////////////////////////////////////////////////////////////