Add help link when Bluetooth adapter is off for WebBluetooth chooser

chrome/browser/chooser_controller/mock_chooser_controller.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chooser_controller/mock_chooser_controller.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 MockChooserController::MockChooserController(content::RenderFrameHost* owner)
     : ChooserController(owner,
                         IDS_USB_DEVICE_CHOOSER_PROMPT_ORIGIN,
-                        IDS_USB_DEVICE_CHOOSER_PROMPT_EXTENSION_NAME),
-      no_options_text_(l10n_util::GetStringUTF16(
-          IDS_DEVICE_CHOOSER_NO_DEVICES_FOUND_PROMPT)) {}
+                        IDS_USB_DEVICE_CHOOSER_PROMPT_EXTENSION_NAME) {}
 
 MockChooserController::~MockChooserController() {}
 
 bool MockChooserController::ShouldShowIconBeforeText() const {
   return true;
 }
 
 base::string16 MockChooserController::GetNoOptionsText() const {
-  return no_options_text_;
+  return l10n_util::GetStringUTF16(IDS_DEVICE_CHOOSER_NO_DEVICES_FOUND_PROMPT);
 }
 
 base::string16 MockChooserController::GetOkButtonLabel() const {
   return l10n_util::GetStringUTF16(IDS_USB_DEVICE_CHOOSER_CONNECT_BUTTON_TEXT);
 }
 
 size_t MockChooserController::NumOptions() const {
   return options_.size();
 }
 
@@ skipping 20 matching lines @@
 }
 
 void MockChooserController::OnAdapterPresenceChanged(
     content::BluetoothChooser::AdapterPresence presence) {
   ClearAllOptions();
   switch (presence) {
     case content::BluetoothChooser::AdapterPresence::ABSENT:
       NOTREACHED();
       break;
     case content::BluetoothChooser::AdapterPresence::POWERED_OFF:
-      no_options_text_ =
-          l10n_util::GetStringUTF16(IDS_BLUETOOTH_DEVICE_CHOOSER_ADAPTER_OFF);
       status_text_ = base::string16();
       if (view())
         view()->OnAdapterEnabledChanged(false /* Adapter is turned off */);
       break;
     case content::BluetoothChooser::AdapterPresence::POWERED_ON:
-      no_options_text_ =
-          l10n_util::GetStringUTF16(IDS_DEVICE_CHOOSER_NO_DEVICES_FOUND_PROMPT);
       status_text_ =
           l10n_util::GetStringUTF16(IDS_BLUETOOTH_DEVICE_CHOOSER_RE_SCAN);
       if (view())
         view()->OnAdapterEnabledChanged(true /* Adapter is turned on */);
       break;
   }
 }
 
 void MockChooserController::OnDiscoveryStateChanged(
     content::BluetoothChooser::DiscoveryState state) {
@@ skipping 63 matching lines @@
 const int MockChooserController::kNoSignalStrengthLevelImage = -1;
 const int MockChooserController::kSignalStrengthLevel0Bar = 0;
 const int MockChooserController::kSignalStrengthLevel1Bar = 1;
 const int MockChooserController::kSignalStrengthLevel2Bar = 2;
 const int MockChooserController::kSignalStrengthLevel3Bar = 3;
 const int MockChooserController::kSignalStrengthLevel4Bar = 4;
 
 void MockChooserController::ClearAllOptions() {
   options_.clear();
 }