I hit the DCHECK:
[FATAL:storage_area.mojom.cc(1828)] Check failed: !connected. StorageArea::GetAllCallback was destroyed without first either being run or its corresponding binding being closed. It is an error to drop response callbacks which still correspond to an open interface pipe.

Here's a backtrace:
./../../base/debug/stack_trace_posix.cc:820
./../../base/debug/stack_trace.cc:203
./../../base/logging.cc:592
./gen/third_party/blink/public/mojom/dom_storage/storage_area.mojom.cc:1828
./../../base/bind_internal.h:416
./../../base/bind_internal.h:616
./../../base/bind_internal.h:689
./../../base/bind_internal.h:658
./../../base/callback.h:99
./../../mojo/public/cpp/bindings/lib/interface_endpoint_client.cc:32
./../../mojo/public/cpp/bindings/lib/interface_endpoint_client.cc:96
./gen/third_party/blink/public/mojom/dom_storage/storage_area.mojom.cc:1808
./../../buildtools/third_party/libc++/trunk/include/memory:2325
./../../buildtools/third_party/libc++/trunk/include/tuple:365
./../../buildtools/third_party/libc++/trunk/include/tuple:470
./../../base/bind_internal.h:871
./../../base/bind_internal.h:874
./../../base/callback_internal.cc:29
./../../base/memory/ref_counted.h:403
./../../base/memory/scoped_refptr.h:284
./../../base/memory/scoped_refptr.h:208
./../../base/callback_internal.cc:84
./../../base/callback_forward.h:11
./../../buildtools/third_party/libc++/trunk/include/tuple:171
./../../buildtools/third_party/libc++/trunk/include/tuple:365
./../../buildtools/third_party/libc++/trunk/include/tuple:470
./../../base/bind_internal.h:871
./../../base/bind_internal.h:874
./../../base/callback_internal.cc:29
./../../base/memory/ref_counted.h:403
./../../base/memory/scoped_refptr.h:284
./../../base/memory/scoped_refptr.h:208
./../../base/callback_internal.cc:84
./../../base/callback_forward.h:11
./../../buildtools/third_party/libc++/trunk/include/memory:1867
./../../content/browser/dom_storage/local_storage_context_mojo.cc:495
./../../base/bind_internal.h:516
./../../base/bind_internal.h:616
./../../base/bind_internal.h:689
./../../base/bind_internal.h:658
./../../base/callback.h:99
./../../base/debug/task_annotator.cc:99
./../../base/message_loop/message_loop_impl.cc:404
./../../base/message_loop/message_loop_impl.cc:415
./../../base/message_loop/message_loop_impl.cc:499
./../../base/message_loop/message_pump_libevent.cc:210
./../../base/message_loop/message_loop_impl.cc:356
./../../base/run_loop.cc:102
./../../base/threading/thread.cc:257
./../../content/browser/browser_process_sub_thread.cc:174
./../../content/browser/browser_process_sub_thread.cc:126
./../../base/threading/thread.cc:353
./../../base/threading/platform_thread_posix.cc:81

This is during shutdown. It appears https://cs.chromium.org/chromium/src/content/browser/dom_storage/storage_area_impl.cc?rcl=9e5c91f5695c84ffdc06ddbff56f1a7b8d2bb42a&l=139 will clear all the callbacks before the pipe is closed.