change summary:
- modified FEmitDefaultValueHelper::HandleInstancedSubobject() to allow callers to control whether or not to generate code to create the instance or access it (if it should already have been created).
- modified FEmitDefaultValueHelper::GenerateConstructor() to generate code to assign a fallback native root component if available (to match the runtime side in the non-generated code case)
#codereview Maciej.Mroz
[CL 2685496 by Phillip Kavan in Main branch]
#jira OPP-3723
#jira FORT-14720
Merging //depot/UE4-LauncherDev/Engine/Source/Developer/FriendsAndChat/Private/Layers/Domain/MessageService.cpp to //depot/UE4/Engine/Source/Developer/FriendsAndChat/Private/Layers/Domain/MessageService.cpp
[CL 2685307 by Eric Newman in Main branch]
#UE4 Fixed a logging issue causing only the 0th CPU/GPU test results to be shown instead of the average. Also removed an unused variable.
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Integrated using branch Ue4-To-UE4-Fortnite-Simple (reversed) of change#2683388 by Bob.Tellez on 2015/09/08 14:04:04.
[CL 2683393 by Bob Tellez in Main branch]
//depot/UE4-Orion/Engine/Source/Developer/FriendsAndChat/...
to //depot/UE4/Engine/Source/Developer/FriendsAndChat/...
[CL 2682562 by Antony Carter in Main branch]
ADDED thumbnail renderer for GeometryCache
ADDED BP creation from GeometryCache asset
ADDED de-registering of handlers during GeomCacheModule shutdown
FIXED bug with importing Materials, though recreating a clean scene in Maya also fixed it (bad Maya history)
[CL 2682433 by Jurre DeBaare in Main branch]
- Gathering coverted class dependencies - fixed and refactored
- improved list of included headers and forward-declared structs
#codereview Mike.Beach
[CL 2681924 by Maciej Mroz in Main branch]
