Centralize FrameSinkId allocation in one place

content/browser/compositor/gpu_process_transport_factory.h

Index: content/browser/compositor/gpu_process_transport_factory.h
diff --git a/content/browser/compositor/gpu_process_transport_factory.h b/content/browser/compositor/gpu_process_transport_factory.h
index 4024c07bde11ce9aeb8fb7773e345053eb310627..a7f646bc95fce21238f358574acefd29272bd0ac 100644
--- a/content/browser/compositor/gpu_process_transport_factory.h
+++ b/content/browser/compositor/gpu_process_transport_factory.h
@@ -16,6 +16,7 @@
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "build/build_config.h"
+#include "cc/surfaces/frame_sink_id_allocator.h"
 #include "content/browser/compositor/image_transport_factory.h"
 #include "gpu/ipc/client/gpu_channel_host.h"
 #include "ui/compositor/compositor.h"
@@ -103,7 +104,7 @@ class GpuProcessTransportFactory : public ui::ContextFactory,
   SharedVulkanContextProvider();
 
   std::unique_ptr<cc::SurfaceManager> surface_manager_;
-  uint32_t next_sink_id_ = 1u;
+  cc::FrameSinkIdAllocator frame_sink_id_allocator_;
 
 #if defined(OS_WIN)
   // Used by output surface, stored in PerCompositorData.