Give the main frame a RenderWidget.

content/renderer/render_view_impl.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_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 660 matching lines @@
   WebFrame* opener_frame = RenderFrameImpl::ResolveOpener(
       params.opener_frame_route_id, &opener_view_routing_id);
   if (opener_view_routing_id != MSG_ROUTING_NONE && was_created_by_renderer)
     opener_id_ = opener_view_routing_id;
 
   display_mode_= params.initial_size.display_mode;
 
   // Ensure we start with a valid next_page_id_ from the browser.
   DCHECK_GE(next_page_id_, 0);
 
-  if (params.main_frame_routing_id != MSG_ROUTING_NONE) {
-    main_render_frame_ = RenderFrameImpl::Create(
-        this, params.main_frame_routing_id);
-    // The main frame WebLocalFrame object is closed by
-    // RenderFrameImpl::frameDetached().
-    WebLocalFrame* web_frame = WebLocalFrame::create(
-        blink::WebTreeScopeType::Document, main_render_frame_);
-    main_render_frame_->SetWebFrame(web_frame);
-  }
-
   webwidget_ = WebView::create(this);
   webwidget_mouse_lock_target_.reset(new WebWidgetLockTarget(webwidget_));
 
   g_view_map.Get().insert(std::make_pair(webview(), this));
   g_routing_id_view_map.Get().insert(std::make_pair(routing_id_, this));
 
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
 
   if (command_line.HasSwitch(switches::kStatsCollectionController))
     stats_collection_observer_.reset(new StatsCollectionObserver(this));
 
+  if (params.main_frame_routing_id != MSG_ROUTING_NONE) {
+    main_render_frame_ = RenderFrameImpl::CreateMainFrame(
+        this, params.main_frame_routing_id, params.main_frame_widget_routing_id,
+        params.surface_id, params.hidden, screen_info(), compositor_deps_);
+  }
+
   RenderFrameProxy* proxy = NULL;
   if (params.proxy_routing_id != MSG_ROUTING_NONE) {
     CHECK(params.swapped_out);
     if (main_render_frame_) {
       proxy = RenderFrameProxy::CreateProxyToReplaceFrame(
           main_render_frame_, params.proxy_routing_id,
           blink::WebTreeScopeType::Document);
       main_render_frame_->set_render_frame_proxy(proxy);
     } else {
       proxy = RenderFrameProxy::CreateFrameProxy(
           params.proxy_routing_id,
           MSG_ROUTING_NONE,
           routing_id_,
           params.replicated_frame_state);
     }
   }
 
   // When not using swapped out state, just use the WebRemoteFrame as the main
   // frame.
   if (proxy && SiteIsolationPolicy::IsSwappedOutStateForbidden()) {
     webview()->setMainFrame(proxy->web_frame());
     // Initialize the WebRemoteFrame with information replicated from the
     // browser process.
     proxy->SetReplicatedState(params.replicated_frame_state);
-  } else {
-    webview()->setMainFrame(main_render_frame_->GetWebFrame());

[dcheng, 2015/08/24 18:50:20]

I moved this into RenderFrameImpl::CreateMainFrame. Strictly speaking, this
isn't needed anymore. However, doing this lets us hide the details of
instantiating the proxy WebWidget for the main frame in RenderWidget: otherwise,
WebFrame::view() would return null in RenderWidget::CreateWebFrameWidget().

   }
   if (main_render_frame_)
     main_render_frame_->Initialize();
 
 #if defined(OS_ANDROID)
   content_detectors_.push_back(linked_ptr<ContentDetector>(
       new AddressDetector()));
   const std::string& contry_iso =
       params.renderer_preferences.network_contry_iso;
   if (!contry_iso.empty()) {
@@ skipping 864 matching lines @@
   params.disposition = NavigationPolicyToDisposition(policy);
   if (!request.isNull()) {
     params.target_url = request.url();
     params.referrer = GetReferrerFromRequest(creator, request);
   }
   params.features = features;
 
   for (size_t i = 0; i < features.additionalFeatures.size(); ++i)
     params.additional_features.push_back(features.additionalFeatures[i]);
 
-  int32 routing_id = MSG_ROUTING_NONE;
-  int32 main_frame_routing_id = MSG_ROUTING_NONE;
-  int32 surface_id = 0;
-  int64 cloned_session_storage_namespace_id = 0;
+  ViewHostMsg_CreateWindow_Reply reply;
+  reply.route_id = MSG_ROUTING_NONE;
+  reply.main_frame_route_id = MSG_ROUTING_NONE;
+  reply.main_frame_widget_route_id = MSG_ROUTING_NONE;
+  reply.surface_id = 0;
+  reply.cloned_session_storage_namespace_id = 0;
 
-  RenderThread::Get()->Send(new ViewHostMsg_CreateWindow(
-      params, &routing_id, &main_frame_routing_id, &surface_id,
-      &cloned_session_storage_namespace_id));
-  if (routing_id == MSG_ROUTING_NONE)
+  RenderThread::Get()->Send(new ViewHostMsg_CreateWindow(params, &reply));
+  if (reply.route_id == MSG_ROUTING_NONE)
     return NULL;
 
   WebUserGestureIndicator::consumeUserGesture();
 
   // While this view may be a background extension page, it can spawn a visible
   // render view. So we just assume that the new one is not another background
   // page instead of passing on our own value.
   // TODO(vangelis): Can we tell if the new view will be a background page?
   bool never_visible = false;
 
   ViewMsg_Resize_Params initial_size = ViewMsg_Resize_Params();
   initial_size.screen_info = screen_info_;
 
   // The initial hidden state for the RenderViewImpl here has to match what the
   // browser will eventually decide for the given disposition. Since we have to
   // return from this call synchronously, we just have to make our best guess
   // and rely on the browser sending a WasHidden / WasShown message if it
   // disagrees.
   ViewMsg_New_Params view_params;
 
   RenderFrameImpl* creator_frame = RenderFrameImpl::FromWebFrame(creator);
   view_params.opener_frame_route_id = creator_frame->GetRoutingID();
   DCHECK_EQ(routing_id_, creator_frame->render_view()->GetRoutingID());
 
   view_params.window_was_created_with_opener = true;
   view_params.renderer_preferences = renderer_preferences_;
   view_params.web_preferences = webkit_preferences_;
-  view_params.view_id = routing_id;
-  view_params.main_frame_routing_id = main_frame_routing_id;
-  view_params.surface_id = surface_id;
+  view_params.view_id = reply.route_id;
+  view_params.main_frame_routing_id = reply.main_frame_route_id;
+  view_params.main_frame_widget_routing_id = reply.main_frame_widget_route_id;
+  view_params.surface_id = reply.surface_id;
   view_params.session_storage_namespace_id =
-      cloned_session_storage_namespace_id;
+      reply.cloned_session_storage_namespace_id;
   view_params.swapped_out = false;
   // WebCore will take care of setting the correct name.
   view_params.replicated_frame_state = FrameReplicationState();
   view_params.proxy_routing_id = MSG_ROUTING_NONE;
   view_params.hidden = (params.disposition == NEW_BACKGROUND_TAB);
   view_params.never_visible = never_visible;
   view_params.next_page_id = 1;
   view_params.initial_size = initial_size;
   view_params.enable_auto_resize = false;
   view_params.min_size = gfx::Size();
@@ skipping 2134 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content