Debugging for https://crbug.com/601435.

mojo/edk/js/handle.cc

Index: mojo/edk/js/handle.cc
diff --git a/mojo/edk/js/handle.cc b/mojo/edk/js/handle.cc
index 9f9f1619cc7a6b0672600293aeda5e57bdede753..d2d6adfa86d243dd475b5284bf9aeb81f6a6697f 100644
--- a/mojo/edk/js/handle.cc
+++ b/mojo/edk/js/handle.cc
@@ -13,15 +13,18 @@ namespace js {
 gin::WrapperInfo HandleWrapper::kWrapperInfo = { gin::kEmbedderNativeGin };
 
 HandleWrapper::HandleWrapper(MojoHandle handle)
-    : handle_(mojo::Handle(handle)) {
+    : handle_(mojo::Handle(handle)), handle_value_(handle) {
+  LOG(INFO) << "Create " << handle_->value();
 }
 
 HandleWrapper::~HandleWrapper() {
   NotifyCloseObservers();
+  LOG(INFO) << "Delete " << handle_->value() << " (" << handle_value_ << ")";
 }
 
 void HandleWrapper::Close() {
   NotifyCloseObservers();
+  LOG(INFO) << "Close " << handle_->value();
   handle_.reset();
 }