WIP: Create a LongStringCollection that transfers long strings with fewer copies.

third_party/WebKit/Source/bindings/tests/results/core/V8TestObject.cpp

Index: third_party/WebKit/Source/bindings/tests/results/core/V8TestObject.cpp
diff --git a/third_party/WebKit/Source/bindings/tests/results/core/V8TestObject.cpp b/third_party/WebKit/Source/bindings/tests/results/core/V8TestObject.cpp
index 7badf063c8a5ecb059a57fc3d016b3639eb12fbb..6878c83e01ba850e06e1f48970187b7426d41b18 100644
--- a/third_party/WebKit/Source/bindings/tests/results/core/V8TestObject.cpp
+++ b/third_party/WebKit/Source/bindings/tests/results/core/V8TestObject.cpp
@@ -7735,6 +7735,7 @@ static void postMessageImpl(const char* interfaceName, TestObject* instance, con
     // This instance supports sending array buffers by move semantics.
     SerializedScriptValue::SerializeOptions options;
     options.transferables = &transferables;
+    options.longStringPolicy = LongStringPolicy(LongStringPolicy::kSameProcess, 512);
     message = SerializedScriptValue::serialize(info.GetIsolate(), info[0], options, exceptionState);
     if (exceptionState.hadException())
       return;