Make <webview> use out-of-process iframe architecture.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 48df2c47c64f2d302060d6147a322e480872294d..b1afdb83f19a85450104b856ea7ca3ee872478ab 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -731,7 +731,11 @@ void RenderViewImpl::Initialize(const ViewMsg_New_Params& params,
   ApplyWebPreferences(webkit_preferences_, webview());
 
   RenderFrameProxy* proxy = NULL;
-  if (params.proxy_routing_id != MSG_ROUTING_NONE) {
+  // Do not create a proxy here if this is a swapped out RenderView for an
+  // inner WebContents.
+  // The proxy will be created in RenderFrameImpl::OnSwapOut().

[nasko, 2015/05/22 16:32:28]

Is it not possible to just pass MSG_ROUTING_NONE from the browser process in
this case? Then it will make this code independent of the boolean.

[lazyboy, 2015/05/26 16:32:55]

Yes, done.

+  if (params.proxy_routing_id != MSG_ROUTING_NONE &&
+      !params.is_inner_web_contents_in_site_per_process) {
     CHECK(params.swapped_out);
     proxy = RenderFrameProxy::CreateProxyToReplaceFrame(
         main_render_frame_, params.proxy_routing_id);