gpu: Notify callbacks the reason for channel creation failure

content/browser/gpu/gpu_client.cc

Index: content/browser/gpu/gpu_client.cc
diff --git a/content/browser/gpu/gpu_client.cc b/content/browser/gpu/gpu_client.cc
index 3faea935db116b06c4a03c4c9c791d9618dc8db5..9fe3e051cea95e9987bd998ee0c850fccf87880d 100644
--- a/content/browser/gpu/gpu_client.cc
+++ b/content/browser/gpu/gpu_client.cc
@@ -41,7 +41,8 @@ void GpuClient::OnError() {
 void GpuClient::OnEstablishGpuChannel(
     const EstablishGpuChannelCallback& callback,
     const IPC::ChannelHandle& channel,
-    const gpu::GPUInfo& gpu_info) {
+    const gpu::GPUInfo& gpu_info,
+    GpuProcessHost::EstablishChannelStatus status) {
   mojo::ScopedMessagePipeHandle channel_handle;
   channel_handle.reset(channel.mojo_handle);
   callback.Run(render_process_id_, std::move(channel_handle), gpu_info);
@@ -58,7 +59,9 @@ void GpuClient::EstablishGpuChannel(
   GpuProcessHost* host =
       GpuProcessHost::Get(GpuProcessHost::GPU_PROCESS_KIND_SANDBOXED);
   if (!host) {
-    OnEstablishGpuChannel(callback, IPC::ChannelHandle(), gpu::GPUInfo());
+    OnEstablishGpuChannel(
+        callback, IPC::ChannelHandle(), gpu::GPUInfo(),
+        GpuProcessHost::EstablishChannelStatus::GPU_ACCESS_DENIED);
     return;
   }