Merge //content/child/permissions into Blink's permissions module.

third_party/WebKit/Source/modules/permissions/PermissionController.cpp

-// 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 "modules/permissions/PermissionController.h"
-
-#include "core/frame/LocalFrame.h"
-#include "platform/RuntimeEnabledFeatures.h"
-#include "public/platform/modules/permissions/WebPermissionClient.h"
-
-namespace blink {
-
-PermissionController::~PermissionController()
-{
-}
-
-void PermissionController::provideTo(LocalFrame& frame, WebPermissionClient* client)
-{
-    ASSERT(RuntimeEnabledFeatures::permissionsEnabled());
-
-    PermissionController* controller = new PermissionController(frame, client);
-    Supplement<LocalFrame>::provideTo(frame, supplementName(), controller);
-}
-
-PermissionController* PermissionController::from(LocalFrame& frame)
-{
-    return static_cast<PermissionController*>(Supplement<LocalFrame>::from(frame, supplementName()));
-}
-
-PermissionController::PermissionController(LocalFrame& frame, WebPermissionClient* client)
-    : LocalFrameLifecycleObserver(&frame)
-    , m_client(client)
-{
-}
-
-const char* PermissionController::supplementName()
-{
-    return "PermissionController";
-}
-
-WebPermissionClient* PermissionController::client() const
-{
-    return m_client;
-}
-
-void PermissionController::willDetachFrameHost()
-{
-    m_client = nullptr;
-}
-
-DEFINE_TRACE(PermissionController)
-{
-    LocalFrameLifecycleObserver::trace(visitor);
-    Supplement<LocalFrame>::trace(visitor);
-}
-
-} // namespace blink