Potential deadlock in destructor of GpuJpegDecodeAcceleratorHost

media/gpu/ipc/client/gpu_jpeg_decode_accelerator_host.cc

Index: media/gpu/ipc/client/gpu_jpeg_decode_accelerator_host.cc
diff --git a/media/gpu/ipc/client/gpu_jpeg_decode_accelerator_host.cc b/media/gpu/ipc/client/gpu_jpeg_decode_accelerator_host.cc
index 1afe39c3db273df7c5e728c9d4cceb61e15e41f3..fca7a5b7741e500bcc18d6ebda152630076e6747 100644
--- a/media/gpu/ipc/client/gpu_jpeg_decode_accelerator_host.cc
+++ b/media/gpu/ipc/client/gpu_jpeg_decode_accelerator_host.cc
@@ -118,11 +118,14 @@ GpuJpegDecodeAcceleratorHost::~GpuJpegDecodeAcceleratorHost() {
     // routed to |receiver_| on IO thread.
     base::WaitableEvent event(base::WaitableEvent::ResetPolicy::AUTOMATIC,
                               base::WaitableEvent::InitialState::NOT_SIGNALED);
-    io_task_runner_->PostTask(FROM_HERE,
-                              base::Bind(&Receiver::InvalidateWeakPtr,
-                                         base::Unretained(receiver_.get()),
-                                         base::Unretained(&event)));
-    event.Wait();
+    bool task_expected_to_run = io_task_runner_->PostTask(
+        FROM_HERE, base::Bind(&Receiver::InvalidateWeakPtr,
+                              base::Unretained(receiver_.get()),
+                              base::Unretained(&event)));
+    // If the current call is happening during the browser shutdown, the
+    // |io_task_runner_| may no longer be accepting tasks.
+    if (task_expected_to_run)
+      event.Wait();
   }
 }