Add a kill switch for all of Web Bluetooth.

chrome/browser/chrome_content_browser_client.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_CHROME_CONTENT_BROWSER_CLIENT_H_
 #define CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <set>
@@ skipping 156 matching lines @@
       content::ResourceContext* context,
       const std::vector<std::pair<int, int>>& render_frames) override;
 
 #if defined(ENABLE_WEBRTC)
   bool AllowWebRTCIdentityCache(const GURL& url,
                                 const GURL& first_party_url,
                                 content::ResourceContext* context) override;
 #endif  // defined(ENABLE_WEBRTC)
 
   bool AllowKeygen(const GURL& url, content::ResourceContext* context) override;
-  bool AllowWebBluetooth(content::BrowserContext* browser_context,
-                         const url::Origin& requesting_origin,
-                         const url::Origin& embedding_origin) override;
+  AllowWebBluetoothResult AllowWebBluetooth(
+      content::BrowserContext* browser_context,
+      const url::Origin& requesting_origin,
+      const url::Origin& embedding_origin) override;
 
   net::URLRequestContext* OverrideRequestContextForURL(
       const GURL& url,
       content::ResourceContext* context) override;
   content::QuotaPermissionContext* CreateQuotaPermissionContext() override;
   scoped_ptr<storage::QuotaEvictionPolicy> GetTemporaryStorageEvictionPolicy(
       content::BrowserContext* context) override;
   void AllowCertificateError(
       content::WebContents* web_contents,
       int cert_error,
@@ skipping 163 matching lines @@
   // Vector of additional ChromeContentBrowserClientParts.
   // Parts are deleted in the reverse order they are added.
   std::vector<ChromeContentBrowserClientParts*> extra_parts_;
 
   base::WeakPtrFactory<ChromeContentBrowserClient> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeContentBrowserClient);
 };
 
 #endif  // CHROME_BROWSER_CHROME_CONTENT_BROWSER_CLIENT_H_