Remove DeviceMonitorLinux::WillDestroyCurrentMessageLoop().

chrome/browser/chrome_device_client.cc

Index: chrome/browser/chrome_device_client.cc
diff --git a/chrome/browser/chrome_device_client.cc b/chrome/browser/chrome_device_client.cc
index 7ce9c4fe5535beabc8b9500ef2fadbf168c5fee2..e6165258aa7f00f805c4f3542de247519de4b0ef 100644
--- a/chrome/browser/chrome_device_client.cc
+++ b/chrome/browser/chrome_device_client.cc
@@ -4,7 +4,6 @@
 
 #include "chrome/browser/chrome_device_client.h"
 
-#include "base/logging.h"
 #include "build/build_config.h"
 #include "content/public/browser/browser_thread.h"
 #include "device/hid/hid_service.h"
@@ -14,7 +13,21 @@ using content::BrowserThread;
 
 ChromeDeviceClient::ChromeDeviceClient() {}
 
-ChromeDeviceClient::~ChromeDeviceClient() {}
+ChromeDeviceClient::~ChromeDeviceClient() {
+#if DCHECK_IS_ON()
+  DCHECK(did_shutdown_);
+#endif
+}
+
+void ChromeDeviceClient::Shutdown() {
+  if (usb_service_)
+    usb_service_->Shutdown();
+  if (hid_service_)
+    hid_service_->Shutdown();
+#if DCHECK_IS_ON()
+  did_shutdown_ = true;
+#endif
+}
 
 device::UsbService* ChromeDeviceClient::GetUsbService() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);