Add help link when Bluetooth adapter is off for WebBluetooth chooser

chrome/browser/chooser_controller/chooser_controller.cc

Index: chrome/browser/chooser_controller/chooser_controller.cc
diff --git a/chrome/browser/chooser_controller/chooser_controller.cc b/chrome/browser/chooser_controller/chooser_controller.cc
index 9277f2b660c8bb9523ef91253efe2248db8eda61..e7d7e5ff122540536cda9a01c760b5a762780359 100644
--- a/chrome/browser/chooser_controller/chooser_controller.cc
+++ b/chrome/browser/chooser_controller/chooser_controller.cc
@@ -66,3 +66,5 @@ bool ChooserController::IsConnected(size_t index) const {
 bool ChooserController::IsPaired(size_t index) const {
   return false;
 }
+
+void ChooserController::OpenAdapterOffHelpUrl() const {}

[Jeffrey Yasskin, 2016/09/28 23:12:23]

Let's put a NOTREACHED() here, since we expect every controller that calls this
function, to override it.

[juncai, 2016/09/29 21:14:57]

Done.