Rename fixture function

shell/platform/windows/fixtures/main.dart

@@ -160,7 +160,7 @@ void enableLifecycleToFrom() async {
 }
 
 @pragma('vm:entry-point')
-void sendCreationMethod() async {
+void sendCreatePlatformViewMethod() async {
   // The platform view method channel uses the standard method codec.
   // See https://github.com/flutter/flutter/blob/master/packages/flutter/lib/src/services/message_codecs.dart#L262
   // for the implementation of the encoding and magic number identifiers.

shell/platform/windows/flutter_windows_engine_unittests.cc

@@ -1172,7 +1172,7 @@ TEST_F(FlutterWindowsEngineTest, ChannelListenedTo) {
 
 TEST_F(FlutterWindowsEngineTest, ReceivePlatformViewMessage) {
   FlutterWindowsEngineBuilder builder{GetContext()};
-  builder.SetDartEntrypoint("sendCreationMethod");
+  builder.SetDartEntrypoint("sendCreatePlatformViewMethod");
   auto engine = builder.Build();
 
   EngineModifier modifier(engine.get());