mojo::Callback -> base::Callback

chrome/browser/ui/android/usb_chooser_dialog_android.cc

Index: chrome/browser/ui/android/usb_chooser_dialog_android.cc
diff --git a/chrome/browser/ui/android/usb_chooser_dialog_android.cc b/chrome/browser/ui/android/usb_chooser_dialog_android.cc
index 4bc2aa36a8b2c7dd28bf72de230598000d466ce0..6026fed341672954c0bd680959514597cc65f021 100644
--- a/chrome/browser/ui/android/usb_chooser_dialog_android.cc
+++ b/chrome/browser/ui/android/usb_chooser_dialog_android.cc
@@ -136,7 +136,7 @@ void UsbChooserDialogAndroid::Select(const std::string& guid) {
 
       device->RequestPermission(
           base::Bind(&OnDevicePermissionRequestComplete, device, callback_));
-      callback_.reset();  // Reset |callback_| so that it is only run once.
+      callback_.Reset();  // Reset |callback_| so that it is only run once.
 
       Java_UsbChooserDialog_closeDialog(base::android::AttachCurrentThread(),
                                         java_dialog_.obj());
@@ -150,8 +150,9 @@ void UsbChooserDialogAndroid::Select(const std::string& guid) {
 }
 
 void UsbChooserDialogAndroid::Cancel() {
+  DCHECK(!callback_.is_null());
   callback_.Run(nullptr);
-  callback_.reset();  // Reset |callback_| so that it is only run once.
+  callback_.Reset();  // Reset |callback_| so that it is only run once.
   Java_UsbChooserDialog_closeDialog(base::android::AttachCurrentThread(),
                                     java_dialog_.obj());