Use ChannelMojo for NaCl PPAPI channels.

components/nacl/loader/nonsfi/nonsfi_listener.cc

Index: components/nacl/loader/nonsfi/nonsfi_listener.cc
diff --git a/components/nacl/loader/nonsfi/nonsfi_listener.cc b/components/nacl/loader/nonsfi/nonsfi_listener.cc
index c89594b3df93d7c5db3561cd040442d45ccc87c8..a0ba4d05bcad8c854247799f5c3190b6c9f0c46d 100644
--- a/components/nacl/loader/nonsfi/nonsfi_listener.cc
+++ b/components/nacl/loader/nonsfi/nonsfi_listener.cc
@@ -109,10 +109,10 @@ void NonSfiListener::OnStart(const nacl::NaClStartParams& params) {
   // plugin's main thread. We just pass the FDs to plugin side.
   // The FDs are created in the browser process. Following check can fail
   // if the preparation for sending NaClProcessMsg_Start were incomplete.
-  CHECK_NE(params.ppapi_browser_channel_handle.socket.fd, -1);
-  CHECK_NE(params.ppapi_renderer_channel_handle.socket.fd, -1);
-  CHECK_NE(params.trusted_service_channel_handle.socket.fd, -1);
-  CHECK_NE(params.manifest_service_channel_handle.socket.fd, -1);
+  CHECK(params.ppapi_browser_channel_handle.mojo_handle.is_valid());
+  CHECK(params.ppapi_renderer_channel_handle.mojo_handle.is_valid());
+  CHECK(params.trusted_service_channel_handle.mojo_handle.is_valid());
+  CHECK(params.manifest_service_channel_handle.mojo_handle.is_valid());
 
   ppapi::SetIPCChannelHandles(
       params.ppapi_browser_channel_handle,