Make PermissionRequestManager::requests_ correspond to the active prompt

chrome/browser/ui/permission_bubble/mock_permission_prompt.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/permission_bubble/mock_permission_prompt.h"
 
 #include "base/bind.h"
 #include "base/run_loop.h"
 #include "chrome/browser/permissions/permission_request_manager.h"
 #include "chrome/browser/ui/permission_bubble/mock_permission_prompt_factory.h"
@@ skipping 19 matching lines @@
 bool MockPermissionPrompt::HidesAutomatically() {
   return false;
 }
 
 void MockPermissionPrompt::Hide() {
   if (is_visible_ && factory_)
     factory_->HideView(this);
   is_visible_ = false;
 }
 
-bool MockPermissionPrompt::IsVisible() {
-  return is_visible_;
-}
-
 void MockPermissionPrompt::UpdateAnchorPosition() {}
 
 gfx::NativeWindow MockPermissionPrompt::GetNativeWindow() {
   // This class should only be used when the UI is not necessary.
   NOTREACHED();
   return nullptr;
 }
 
+bool MockPermissionPrompt::IsVisible() {
+  return is_visible_;
+}
+
 MockPermissionPrompt::MockPermissionPrompt(MockPermissionPromptFactory* factory,
                                            PermissionRequestManager* manager)
     : factory_(factory),
       manager_(manager),
       can_update_ui_(true),
       is_visible_(false) {}