Added the Vulkan Context Provider implementation.

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 a8836e253d4eb8feca4dfbef3966dda46ab57625..dff1ba3b39c203e0da4635bb90dbf2c9a2450108 100644
--- a/content/browser/compositor/gpu_process_transport_factory.h
+++ b/content/browser/compositor/gpu_process_transport_factory.h
@@ -30,6 +30,7 @@ namespace cc {
 class SingleThreadTaskGraphRunner;
 class SoftwareOutputDevice;
 class SurfaceManager;
+class VulkanInProcessContextProvider;
 }
 
 namespace content {
@@ -95,6 +96,9 @@ class GpuProcessTransportFactory
   void OnLostMainThreadSharedContextInsideCallback();
   void OnLostMainThreadSharedContext();
 
+  scoped_refptr<cc::VulkanInProcessContextProvider>
+  SharedVulkanContextProvider();
+
   typedef std::map<ui::Compositor*, PerCompositorData*> PerCompositorDataMap;
   PerCompositorDataMap per_compositor_data_;
   scoped_refptr<ContextProviderCommandBuffer> shared_main_thread_contexts_;
@@ -105,6 +109,10 @@ class GpuProcessTransportFactory
   std::unique_ptr<cc::SingleThreadTaskGraphRunner> task_graph_runner_;
   scoped_refptr<ContextProviderCommandBuffer> shared_worker_context_provider_;
 
+  bool shared_vulkan_context_provider_initialized_ = false;
+  scoped_refptr<cc::VulkanInProcessContextProvider>
+      shared_vulkan_context_provider_;
+
 #if defined(OS_WIN)
   std::unique_ptr<OutputDeviceBacking> software_backing_;
 #endif