gpu: Notify callbacks the reason for channel creation failure

content/browser/gpu/gpu_process_host.cc

Index: content/browser/gpu/gpu_process_host.cc
diff --git a/content/browser/gpu/gpu_process_host.cc b/content/browser/gpu/gpu_process_host.cc
index 04d1e2e6d6c2509ded7e39314799ef0ae82f708a..16b1f0db35a5dbd3295720daeddaf209207af1e0 100644
--- a/content/browser/gpu/gpu_process_host.cc
+++ b/content/browser/gpu/gpu_process_host.cc
@@ -677,7 +677,8 @@ void GpuProcessHost::EstablishGpuChannel(
   // If GPU features are already blacklisted, no need to establish the channel.
   if (!GpuDataManagerImpl::GetInstance()->GpuAccessAllowed(NULL)) {
     DVLOG(1) << "GPU blacklisted, refusing to open a GPU channel.";
-    callback.Run(IPC::ChannelHandle(), gpu::GPUInfo());
+    callback.Run(IPC::ChannelHandle(), gpu::GPUInfo(),
+                 EstablishChannelStatus::GPU_ACCESS_DENIED);
     return;
   }
 
@@ -749,13 +750,15 @@ void GpuProcessHost::OnChannelEstablished(
   if (channel_handle.is_valid() &&
       !GpuDataManagerImpl::GetInstance()->GpuAccessAllowed(nullptr)) {
     gpu_service_ptr_->CloseChannel(client_id);
-    callback.Run(IPC::ChannelHandle(), gpu::GPUInfo());
+    callback.Run(IPC::ChannelHandle(), gpu::GPUInfo(),
+                 EstablishChannelStatus::GPU_ACCESS_DENIED);
     RecordLogMessage(logging::LOG_WARNING, "WARNING",
                      "Hardware acceleration is unavailable.");
     return;
   }
 
-  callback.Run(IPC::ChannelHandle(channel_handle.release()), gpu_info_);
+  callback.Run(IPC::ChannelHandle(channel_handle.release()), gpu_info_,
+               EstablishChannelStatus::SUCCESS);
 }
 
 void GpuProcessHost::OnGpuMemoryBufferCreated(
@@ -1043,7 +1046,8 @@ void GpuProcessHost::SendOutstandingReplies() {
   while (!channel_requests_.empty()) {
     auto callback = channel_requests_.front();
     channel_requests_.pop();
-    callback.Run(IPC::ChannelHandle(), gpu::GPUInfo());
+    callback.Run(IPC::ChannelHandle(), gpu::GPUInfo(),
+                 EstablishChannelStatus::GPU_HOST_INVALID);
   }
 
   while (!create_gpu_memory_buffer_requests_.empty()) {