Bug 1364563 - Update render mode and fallback to software solution when GPU process is killed; r=dvander

MozReview-Commit-ID: 5Sewt2wtku8

--HG--
extra : rebase_source : 94b1743f4e42d2a4526521f61fea9fe3b89a76ec

dom/ipc/ContentChild.cpp

@@ -1326,6 +1326,7 @@ ContentChild::RecvReinitRendering(Endpoint<PCompositorManagerChild>&& aComposito
   if (!gfx::VRManagerChild::ReinitForContent(Move(aVRBridge))) {
     return IPC_FAIL_NO_REASON(this);
   }
+  gfxPlatform::GetPlatform()->CompositorUpdated();
 
   // Establish new PLayerTransactions.
   for (const auto& tabChild : tabs) {

gfx/ipc/GPUProcessManager.cpp

@@ -428,6 +428,17 @@ GPUProcessManager::OnRemoteProcessDeviceReset(GPUProcessHost* aHost)
     DestroyProcess();
     DisableGPUProcess("GPU processed experienced too many device resets");
 
+    // Reaches the limited TDR attempts, fallback to software solution.
+    gfxConfig::SetFailed(Feature::HW_COMPOSITING,
+      FeatureStatus::Blocked,
+      "Too many attemps of D3D11 creation, fallback to software solution.");
+    gfxConfig::SetFailed(Feature::D3D11_COMPOSITING,
+      FeatureStatus::Blocked,
+      "Too many attemps of D3D11 creation, fallback to software solution.");
+    gfxConfig::SetFailed(Feature::DIRECT2D,
+      FeatureStatus::Blocked,
+      "Too many attemps of D3D11 creation, fallback to software solution.");
+
     HandleProcessLost();
     return;
   }