Fix OOP iframe prototype to allow BrowserPlugin outside webview.

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index abf4b6f7162a1ddaeea012136fc4a4468a51c02e..264c0c35bf52b8c72f4cc453d6d613d512cae3db 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -1105,6 +1105,10 @@ void ChromeContentRendererClient::RegisterPPAPIInterfaceFactories(
 
 bool ChromeContentRendererClient::AllowBrowserPlugin(
     WebKit::WebPluginContainer* container) const {
+  // Always allow the BrowserPlugin in the site-per-process prototype.
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kSitePerProcess))
+    return true;
+
   // If this |BrowserPlugin| <object> in the |container| is not inside a
   // <webview> shadowHost, we disable instantiating this plugin. This is to
   // discourage and prevent developers from accidentally attaching <object>