RenderWidget: make routing_id be a parameter of the ctor

content/renderer/render_frame_impl.cc

 // Copyright 2013 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_frame_impl.h"
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 1324 matching lines @@
 void RenderFrameImpl::PepperSelectionChanged(
     PepperPluginInstanceImpl* instance) {
   if (instance != focused_pepper_plugin_)
     return;
   SyncSelectionIfRequired();
 }
 
 RenderWidgetFullscreenPepper* RenderFrameImpl::CreatePepperFullscreenContainer(
     PepperPluginInstanceImpl* plugin) {
   GURL active_url;
-  if (render_view_->webview())
+  if (render_view()->webview())
     active_url = render_view()->GetURLForGraphicsContext3D();
+
+  // Synchronous IPC to obtain a routing id for the fullscreen widget.
+  int32_t fullscreen_widget_routing_id = MSG_ROUTING_NONE;
+  if (!RenderThreadImpl::current_render_message_filter()
+           ->CreateFullscreenWidget(render_view()->routing_id(),
+                                    &fullscreen_widget_routing_id)) {
+    return nullptr;
+  }
+
   RenderWidgetFullscreenPepper* widget = RenderWidgetFullscreenPepper::Create(
-      render_view()->routing_id(), GetRenderWidget()->compositor_deps(),
-      plugin, active_url, GetRenderWidget()->screen_info());
+      fullscreen_widget_routing_id, render_view()->routing_id(),
+      GetRenderWidget()->compositor_deps(), plugin, active_url,
+      GetRenderWidget()->screen_info());
   widget->show(blink::WebNavigationPolicyIgnore);
   return widget;
 }
 
 bool RenderFrameImpl::IsPepperAcceptingCompositionEvents() const {
   if (!focused_pepper_plugin_)
     return false;
   return focused_pepper_plugin_->IsPluginAcceptingCompositionEvents();
 }
 
@@ skipping 5253 matching lines @@
   // event target. Potentially a Pepper plugin will receive the event.
   // In order to tell whether a plugin gets the last mouse event and which it
   // is, we set |pepper_last_mouse_event_target_| to null here. If a plugin gets
   // the event, it will notify us via DidReceiveMouseEvent() and set itself as
   // |pepper_last_mouse_event_target_|.
   pepper_last_mouse_event_target_ = nullptr;
 #endif
 }
 
 }  // namespace content