[mojo-edk] Bind a child token to child launches and port reservations.

chrome/browser/chromeos/arc/gpu_arc_video_service_host.cc

Index: chrome/browser/chromeos/arc/gpu_arc_video_service_host.cc
diff --git a/chrome/browser/chromeos/arc/gpu_arc_video_service_host.cc b/chrome/browser/chromeos/arc/gpu_arc_video_service_host.cc
index 2588717d0b53242cf70b820ec7de6505a1eeee7d..940ecf624f099aac5a5c6d1a7b56ea37e18592fb 100644
--- a/chrome/browser/chromeos/arc/gpu_arc_video_service_host.cc
+++ b/chrome/browser/chromeos/arc/gpu_arc_video_service_host.cc
@@ -60,8 +60,9 @@ void GpuArcVideoServiceHost::OnRequestArcVideoAcceleratorChannel(
   const base::ProcessHandle kUnusedChildProcessHandle =
       base::kNullProcessHandle;
   mojo::edk::PlatformChannelPair channel_pair;
+  std::string child_token = mojo::edk::GenerateRandomToken();
   mojo::edk::ChildProcessLaunched(kUnusedChildProcessHandle,
-                                  channel_pair.PassServerHandle());
+                                  channel_pair.PassServerHandle(), child_token);
 
   MojoHandle wrapped_handle;
   MojoResult wrap_result = mojo::edk::CreatePlatformHandleWrapper(
@@ -75,7 +76,7 @@ void GpuArcVideoServiceHost::OnRequestArcVideoAcceleratorChannel(
 
   std::string token = mojo::edk::GenerateRandomToken();
   mojo::ScopedMessagePipeHandle server_pipe =
-      mojo::edk::CreateParentMessagePipe(token);
+      mojo::edk::CreateParentMessagePipe(token, child_token);
   if (!server_pipe.is_valid()) {
     LOG(ERROR) << "Invalid pipe";
     callback.Run(mojo::ScopedHandle(), std::string());