Change ChooserController ownership model

chrome/browser/ui/bluetooth/chrome_extension_bluetooth_chooser.cc

Index: chrome/browser/ui/bluetooth/chrome_extension_bluetooth_chooser.cc
diff --git a/chrome/browser/ui/bluetooth/chrome_extension_bluetooth_chooser.cc b/chrome/browser/ui/bluetooth/chrome_extension_bluetooth_chooser.cc
index bb653096282127a0834a23019250b6b20dbb1b07..b1962b9af9884a9abbb66754b9d25faf4a0776ea 100644
--- a/chrome/browser/ui/bluetooth/chrome_extension_bluetooth_chooser.cc
+++ b/chrome/browser/ui/bluetooth/chrome_extension_bluetooth_chooser.cc
@@ -11,11 +11,15 @@
 ChromeExtensionBluetoothChooser::ChromeExtensionBluetoothChooser(
     content::RenderFrameHost* frame,
     const content::BluetoothChooser::EventHandler& event_handler) {
-  bluetooth_chooser_controller_.reset(
+  std::unique_ptr<BluetoothChooserController> bluetooth_chooser_controller(
       new BluetoothChooserController(frame, event_handler));
+  // Since ChromeExtensionBluetoothChooser object is destroyed before the
+  // view object which owns |bluetooth_chooser_controller_| when the chooser
+  // bubble/dialog closes, it is safe to store and use the raw pointer here.
+  bluetooth_chooser_controller_ = bluetooth_chooser_controller.get();
   chooser_dialog_.reset(new ChromeExtensionChooserDialog(
       content::WebContents::FromRenderFrameHost(frame)));
-  chooser_dialog_->ShowDialog(bluetooth_chooser_controller_.get());
+  chooser_dialog_->ShowDialog(std::move(bluetooth_chooser_controller));
 }
 
 ChromeExtensionBluetoothChooser::~ChromeExtensionBluetoothChooser() {}