--- a/gfx/ipc/GPUParent.cpp
+++ b/gfx/ipc/GPUParent.cpp
@@ -326,27 +326,16 @@ GPUParent::RecvGetDeviceStatus(GPUDevice
 #else
   aOut->gpuDevice() = null_t();
 #endif
 
   return IPC_OK();
 }
 
 mozilla::ipc::IPCResult
-GPUParent::RecvSimulateDeviceReset(GPUDeviceData* aOut)
-{
-#if defined(XP_WIN)
-  DeviceManagerDx::Get()->ForceDeviceReset(ForcedDeviceResetReason::COMPOSITOR_UPDATED);
-  DeviceManagerDx::Get()->MaybeResetAndReacquireDevices();
-#endif
-  RecvGetDeviceStatus(aOut);
-  return IPC_OK();
-}
-
-mozilla::ipc::IPCResult
 GPUParent::RecvNewContentCompositorManager(Endpoint<PCompositorManagerParent>&& aEndpoint)
 {
   CompositorManagerParent::Create(Move(aEndpoint));
   return IPC_OK();
 }
 
 mozilla::ipc::IPCResult
 GPUParent::RecvNewContentImageBridge(Endpoint<PImageBridgeParent>&& aEndpoint)

--- a/gfx/ipc/GPUParent.h
+++ b/gfx/ipc/GPUParent.h
@@ -43,17 +43,16 @@ public:
   mozilla::ipc::IPCResult RecvInitProfiler(Endpoint<PProfilerChild>&& aEndpoint) override;
   mozilla::ipc::IPCResult RecvUpdatePref(const GfxPrefSetting& pref) override;
   mozilla::ipc::IPCResult RecvUpdateVar(const GfxVarUpdate& pref) override;
   mozilla::ipc::IPCResult RecvNewContentCompositorManager(Endpoint<PCompositorManagerParent>&& aEndpoint) override;
   mozilla::ipc::IPCResult RecvNewContentImageBridge(Endpoint<PImageBridgeParent>&& aEndpoint) override;
   mozilla::ipc::IPCResult RecvNewContentVRManager(Endpoint<PVRManagerParent>&& aEndpoint) override;
   mozilla::ipc::IPCResult RecvNewContentVideoDecoderManager(Endpoint<PVideoDecoderManagerParent>&& aEndpoint) override;
   mozilla::ipc::IPCResult RecvGetDeviceStatus(GPUDeviceData* aOutStatus) override;
-  mozilla::ipc::IPCResult RecvSimulateDeviceReset(GPUDeviceData* aOutStatus) override;
   mozilla::ipc::IPCResult RecvAddLayerTreeIdMapping(const LayerTreeIdMapping& aMapping) override;
   mozilla::ipc::IPCResult RecvRemoveLayerTreeIdMapping(const LayerTreeIdMapping& aMapping) override;
   mozilla::ipc::IPCResult RecvNotifyGpuObservers(const nsCString& aTopic) override;
   mozilla::ipc::IPCResult RecvRequestMemoryReport(
     const uint32_t& generation,
     const bool& anonymize,
     const bool& minimizeMemoryUsage,
     const MaybeFileDesc& DMDFile) override;

--- a/gfx/ipc/GPUProcessManager.cpp
+++ b/gfx/ipc/GPUProcessManager.cpp
@@ -416,20 +416,16 @@ GPUProcessManager::ResetCompositors()
 
 void
 GPUProcessManager::SimulateDeviceReset()
 {
   // Make sure we rebuild environment and configuration for accelerated features.
   gfxPlatform::GetPlatform()->CompositorUpdated();
 
   if (mProcess) {
-    GPUDeviceData data;
-    if (mGPUChild->SendSimulateDeviceReset(&data)) {
-      gfxPlatform::GetPlatform()->ImportGPUDeviceData(data);
-    }
     OnRemoteProcessDeviceReset(mProcess);
   } else {
     OnInProcessDeviceReset();
   }
 }
 
 void
 GPUProcessManager::DisableWebRender(wr::WebRenderError aError)

--- a/gfx/ipc/PGPU.ipdl
+++ b/gfx/ipc/PGPU.ipdl
@@ -75,20 +75,16 @@ parent:
   // Called to notify the GPU process of who owns a layersId.
   sync AddLayerTreeIdMapping(LayerTreeIdMapping mapping);
   async RemoveLayerTreeIdMapping(LayerTreeIdMapping mapping);
 
   // Request the current DeviceStatus from the GPU process. This blocks until
   // one is available (i.e., Init has completed).
   sync GetDeviceStatus() returns (GPUDeviceData status);
 
-  // Request to simulate device reset and to get the updated DeviceStatus from
-  // the GPU process. This blocks until one is available (i.e., Init has completed).
-  sync SimulateDeviceReset() returns (GPUDeviceData status);
-
   // Have a message be broadcasted to the GPU process by the GPU process
   // observer service.
   async NotifyGpuObservers(nsCString aTopic);
 
   async RequestMemoryReport(uint32_t generation,
                             bool anonymize,
                             bool minimizeMemoryUsage,
                             MaybeFileDesc DMDFile);

--- a/ipc/ipdl/sync-messages.ini
+++ b/ipc/ipdl/sync-messages.ini
@@ -925,18 +925,16 @@ description =
 [PRemoteSpellcheckEngine::CheckAndSuggest]
 description =
 [PRemoteSpellcheckEngine::SetDictionary]
 description =
 [PGPU::AddLayerTreeIdMapping]
 description =
 [PGPU::GetDeviceStatus]
 description =
-[PGPU::SimulateDeviceReset]
-description =
 [PAPZCTreeManager::ReceiveMultiTouchInputEvent]
 description =
 [PAPZCTreeManager::ReceiveMouseInputEvent]
 description =
 [PAPZCTreeManager::ReceivePanGestureInputEvent]
 description =
 [PAPZCTreeManager::ReceivePinchGestureInputEvent]
 description =