Add help link when Bluetooth adapter is off for WebBluetooth chooser

chrome/browser/chooser_controller/mock_chooser_controller.h

Index: chrome/browser/chooser_controller/mock_chooser_controller.h
diff --git a/chrome/browser/chooser_controller/mock_chooser_controller.h b/chrome/browser/chooser_controller/mock_chooser_controller.h
index 5b486e3eb01db6308fb7be013d07406828762eaf..898a5c8464829e87fbc0ed92b1e5d9187721bf5a 100644
--- a/chrome/browser/chooser_controller/mock_chooser_controller.h
+++ b/chrome/browser/chooser_controller/mock_chooser_controller.h
@@ -33,6 +33,7 @@ class MockChooserController : public ChooserController {
   bool IsConnected(size_t index) const override;
   bool IsPaired(size_t index) const override;
   base::string16 GetStatus() const override;
+  MOCK_CONST_METHOD0(OpenAdapterOffHelpUrl, void());
   MOCK_METHOD0(RefreshOptions, void());
   MOCK_METHOD1(Select, void(size_t index));
   MOCK_METHOD0(Cancel, void());
@@ -70,7 +71,6 @@ class MockChooserController : public ChooserController {
   };
 
   std::vector<OptionInfo> options_;
-  base::string16 no_options_text_;
   base::string16 status_text_;
 
   DISALLOW_COPY_AND_ASSIGN(MockChooserController);