Avoid unnecessary byte-swapping in blink's SerializedScriptValue.

third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h

Index: third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h b/third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h
index 08d5b8d24396af804fc5b9d69b946a79ebec50e9..5292e694ed4da06632868c8fa5925f0c68aed68b 100644
--- a/third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h
+++ b/third_party/WebKit/Source/bindings/core/v8/SerializedScriptValue.h
@@ -75,7 +75,12 @@ class CORE_EXPORT SerializedScriptValue
   // Version 9: Added Map and Set support.
   // [versions skipped]
   // Version 16: Separate versioning between V8 and Blink.
-  static const uint32_t wireFormatVersion = 16;
+  // Version 17: Remove unnecessary byte flipping in wire format.
+  //
+  // The following versions cannot be used, in order to be able to
+  // deserialize version 0 SSVs. The class implementation has details.
+  // DO NOT USE: 35, 64, 68, 73, 78, 82, 83, 85, 91, 98, 102, 108, 123.

[jsbell, 2017/04/07 23:40:34]

static_assert() please!

[pwnall, 2017/04/08 01:09:08]

Done.
Thanks for the suggestion! That's a great idea! I placed the static_assert near
the code that uses the assumption, to help a curious developer who might tinker
with this code.

+  static const uint32_t wireFormatVersion = 17;
 
   struct SerializeOptions {
     STACK_ALLOCATED();