RenderWidget/RenderView: encapsulate ViewHostMsg_Show, etc, in a callback

content/renderer/render_widget_fullscreen.cc

-// 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.
-
-#include "content/renderer/render_widget_fullscreen.h"
-
-#include "content/common/view_messages.h"
-#include "content/renderer/render_thread_impl.h"
-#include "third_party/WebKit/public/web/WebWidget.h"
-
-using blink::WebWidget;
-
-namespace content {
-
-void RenderWidgetFullscreen::show(blink::WebNavigationPolicy) {
-  DCHECK(!did_show_) << "received extraneous Show call";
-  DCHECK_NE(MSG_ROUTING_NONE, routing_id());
-  DCHECK_NE(MSG_ROUTING_NONE, opener_id_);
-
-  if (!did_show_) {
-    did_show_ = true;
-    Send(new ViewHostMsg_ShowFullscreenWidget(opener_id_, routing_id()));
-    SetPendingWindowRect(initial_rect_);
-  }
-}
-
-RenderWidgetFullscreen::RenderWidgetFullscreen(
-    int32_t widget_routing_id,
-    CompositorDependencies* compositor_deps,
-    const ScreenInfo& screen_info)
-    : RenderWidget(widget_routing_id,
-                   compositor_deps,
-                   blink::WebPopupTypeNone,
-                   screen_info,
-                   false,
-                   false,
-                   false) {}
-
-RenderWidgetFullscreen::~RenderWidgetFullscreen() {}
-
-WebWidget* RenderWidgetFullscreen::CreateWebWidget() {
-  // TODO(boliu): Handle full screen render widgets here.
-  return RenderWidget::CreateWebWidget(this);
-}
-
-bool RenderWidgetFullscreen::Init(int32_t opener_id) {
-  DCHECK(!GetWebWidget());
-
-  RenderWidget::Init(opener_id, CreateWebWidget());
-  return true;
-}
-
-}  // namespace content