Remove remaining dead code that was used to implement grouped permission drop downs

chrome/browser/permissions/permission_request_manager_unittest.cc

 // Copyright 2014 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 <stddef.h>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 43 matching lines @@
     manager_.reset(new PermissionRequestManager(web_contents()));
     prompt_factory_.reset(new MockPermissionPromptFactory(manager_.get()));
   }
 
   void TearDown() override {
     prompt_factory_.reset();
     manager_.reset();
     ChromeRenderViewHostTestHarness::TearDown();
   }
 
-  void ToggleAccept(int index, bool value) {
-    manager_->ToggleAccept(index, value);
-  }
-
   void Accept() {
     manager_->Accept();
   }
 
   void Deny() {
     manager_->Deny();
   }
 
   void Closing() {
     manager_->Closing();
@@ skipping 562 matching lines @@
       PermissionUmaUtil::kPermissionsPromptMergedBubbleDenied,
       static_cast<base::HistogramBase::Sample>(
           PermissionRequestType::PERMISSION_MEDIASTREAM_MIC),
       1);
   histograms.ExpectBucketCount(
       PermissionUmaUtil::kPermissionsPromptMergedBubbleDenied,
       static_cast<base::HistogramBase::Sample>(
           PermissionRequestType::PERMISSION_MEDIASTREAM_CAMERA),
       1);
 }