cc: Implement shared worker contexts. (v1)

content/browser/compositor/gpu_process_transport_factory.cc

Index: content/browser/compositor/gpu_process_transport_factory.cc
diff --git a/content/browser/compositor/gpu_process_transport_factory.cc b/content/browser/compositor/gpu_process_transport_factory.cc
index 4c0b3630df7eaa3c2565da02b28c9161b2467e5a..1dc681a858a633204b9f571cc16db9217055d7b2 100644
--- a/content/browser/compositor/gpu_process_transport_factory.cc
+++ b/content/browser/compositor/gpu_process_transport_factory.cc
@@ -245,8 +245,10 @@ void GpuProcessTransportFactory::EstablishedGpuChannel(
     if (shared_worker_context_provider_) {
       base::AutoLock lock(*shared_worker_context_provider_->GetLock());
       if (shared_worker_context_provider_->ContextGL()
-              ->GetGraphicsResetStatusKHR() != GL_NO_ERROR)
+              ->GetGraphicsResetStatusKHR() != GL_NO_ERROR) {
+        shared_worker_context_provider_->Destroy();
         shared_worker_context_provider_ = nullptr;
+      }
     }
     scoped_refptr<GpuChannelHost> gpu_channel_host =
         BrowserGpuChannelHostFactory::instance()->GetGpuChannel();
@@ -265,6 +267,8 @@ void GpuProcessTransportFactory::EstablishedGpuChannel(
         if (shared_worker_context_provider_ &&
             !shared_worker_context_provider_->BindToCurrentThread())
           shared_worker_context_provider_ = nullptr;
+        if (shared_worker_context_provider_)
+          shared_worker_context_provider_->SetupLock();
       }
     }