gpu: Add out-of-line copy ctors for complex classes.

gpu/command_buffer/service/sync_point_manager.cc

Index: gpu/command_buffer/service/sync_point_manager.cc
diff --git a/gpu/command_buffer/service/sync_point_manager.cc b/gpu/command_buffer/service/sync_point_manager.cc
index 52559b2d156567998005d42b9a7010d096a2803b..1245a80029b90ad453d864920bc2982a498375b4 100644
--- a/gpu/command_buffer/service/sync_point_manager.cc
+++ b/gpu/command_buffer/service/sync_point_manager.cc
@@ -135,6 +135,8 @@ SyncPointOrderData::OrderFence::OrderFence(
     scoped_refptr<SyncPointClientState> state)
     : order_num(order), fence_release(release), client_state(state) {}
 
+SyncPointOrderData::OrderFence::OrderFence(const OrderFence& other) = default;
+
 SyncPointOrderData::OrderFence::~OrderFence() {}
 
 SyncPointOrderData::SyncPointOrderData()
@@ -177,6 +179,9 @@ SyncPointClientState::ReleaseCallback::ReleaseCallback(
     const base::Closure& callback)
     : release_count(release), callback_closure(callback) {}
 
+SyncPointClientState::ReleaseCallback::ReleaseCallback(
+    const ReleaseCallback& other) = default;
+
 SyncPointClientState::ReleaseCallback::~ReleaseCallback() {}
 
 SyncPointClientState::SyncPointClientState(