Add UMA for the number of devices in the chooser when a device is paired

chrome/browser/ui/browser.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_UI_BROWSER_H_
 #define CHROME_BROWSER_UI_BROWSER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 466 matching lines @@
                     const content::DropData& data,
                     blink::WebDragOperationsMask operations_allowed) override;
   blink::WebSecurityStyle GetSecurityStyle(
       content::WebContents* web_contents,
       content::SecurityStyleExplanations* security_style_explanations) override;
   void ShowCertificateViewerInDevTools(
       content::WebContents* web_contents,
       scoped_refptr<net::X509Certificate> certificate) override;
   std::unique_ptr<content::BluetoothChooser> RunBluetoothChooser(
       content::RenderFrameHost* frame,
-      const content::BluetoothChooser::EventHandler& event_handler) override;
+      const content::BluetoothChooser::EventHandler& event_handler,
+      bool accept_all_devices) override;
   void RequestAppBannerFromDevTools(
       content::WebContents* web_contents) override;
 
   bool is_type_tabbed() const { return type_ == TYPE_TABBED; }
   bool is_type_popup() const { return type_ == TYPE_POPUP; }
 
   bool is_app() const;
   bool is_devtools() const;
 
   // True when the mouse cursor is locked.
@@ skipping 512 matching lines @@
   // The following factory is used for chrome update coalescing.
   base::WeakPtrFactory<Browser> chrome_updater_factory_;
 
   // The following factory is used to close the frame at a later time.
   base::WeakPtrFactory<Browser> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_H_