gpu: Notify callbacks the reason for channel creation failure

content/browser/gpu/gpu_client.h

Index: content/browser/gpu/gpu_client.h
diff --git a/content/browser/gpu/gpu_client.h b/content/browser/gpu/gpu_client.h
index 70eb29f4039c74f3474815043252974675eb2d10..4e45d860d243aaa513e69ec7fba84d1122d988ae 100644
--- a/content/browser/gpu/gpu_client.h
+++ b/content/browser/gpu/gpu_client.h
@@ -6,6 +6,7 @@
 #define CONTENT_BROWSER_GPU_GPU_CLIENT_H_
 
 #include "base/memory/weak_ptr.h"
+#include "content/browser/gpu/gpu_process_host.h"
 #include "ipc/ipc_channel_handle.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "services/ui/public/interfaces/gpu.mojom.h"
@@ -23,7 +24,8 @@ class GpuClient : public ui::mojom::Gpu {
   void OnError();
   void OnEstablishGpuChannel(const EstablishGpuChannelCallback& callback,
                              const IPC::ChannelHandle& channel,
-                             const gpu::GPUInfo& gpu_info);
+                             const gpu::GPUInfo& gpu_info,
+                             GpuProcessHost::EstablishChannelStatus status);
   void OnCreateGpuMemoryBuffer(const CreateGpuMemoryBufferCallback& callback,
                                const gfx::GpuMemoryBufferHandle& handle);