Add message and Help Center link to the chooser UI

chrome/browser/ui/bluetooth/bluetooth_chooser_bubble_delegate.cc

 // Copyright 2015 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/ui/bluetooth/bluetooth_chooser_bubble_delegate.h"
 
 #include "base/stl_util.h"
 #include "chrome/browser/ui/bluetooth/bluetooth_chooser_desktop.h"
+#include "chrome/common/url_constants.h"
 #include "components/bubble/bubble_controller.h"
+#include "url/gurl.h"
 
 BluetoothChooserBubbleDelegate::BluetoothChooserBubbleDelegate(
     content::RenderFrameHost* owner)
     : ChooserBubbleDelegate(owner), bluetooth_chooser_(nullptr) {}
 
 BluetoothChooserBubbleDelegate::~BluetoothChooserBubbleDelegate() {
   if (bluetooth_chooser_)
     bluetooth_chooser_->set_bluetooth_chooser_bubble_delegate(nullptr);
 }
 
@@ skipping 29 matching lines @@
     bubble_controller_->CloseBubble(BUBBLE_CLOSE_CANCELED);
 }
 
 void BluetoothChooserBubbleDelegate::Close() {
   if (bluetooth_chooser_) {
     bluetooth_chooser_->CallEventHandler(
         content::BluetoothChooser::Event::CANCELLED, std::string());
   }
 }
 
+GURL BluetoothChooserBubbleDelegate::GetHelpCenterUrl() const {
+  return GURL(chrome::kChooserBluetoothOverviewURL);
+}
+
 void BluetoothChooserBubbleDelegate::AddDevice(
     const std::string& device_id,
     const base::string16& device_name) {
   device_names_and_ids_.push_back(std::make_pair(device_name, device_id));
   if (observer())
     observer()->OnOptionAdded(device_names_and_ids_.size() - 1);
 }
 
 void BluetoothChooserBubbleDelegate::RemoveDevice(
     const std::string& device_id) {
   for (auto it = device_names_and_ids_.begin();
        it != device_names_and_ids_.end(); ++it) {
     if (it->second == device_id) {
       size_t index = it - device_names_and_ids_.begin();
       device_names_and_ids_.erase(it);
       if (observer())
         observer()->OnOptionRemoved(index);
       return;
     }
   }
 }