Browser Plugin: Add HTML5-like postMessage support

content/browser/browser_plugin/browser_plugin_embedder.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/browser/browser_plugin/browser_plugin_embedder.h"
 
 #include <set>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ skipping 92 matching lines @@
   // TabContents to the guest.
   //
   // For GTK and Aura this is necessary to get proper renderer configuration
   // values for caret blinking interval, colors related to selection and
   // focus.
   *guest_renderer_prefs = *web_contents()->GetMutableRendererPrefs();
 
   guest_renderer_prefs->throttle_input_events = false;
   AddGuest(instance_id, guest_web_contents);
   guest_web_contents->SetDelegate(guest);
+
+  // Create a swapped out RenderView for the guest in the embedder render
+  // process, so that the embedder can access the guest's window object.
+  int guest_routing_id =
+      static_cast<WebContentsImpl*>(guest->GetWebContents())->
+            CreateSwappedOutRenderView(web_contents()->GetSiteInstance());
+  render_view_host->Send(new BrowserPluginMsg_GuestContentWindowReady(
+      instance_id, guest_routing_id));
 }
 
 void BrowserPluginEmbedder::NavigateGuest(
     RenderViewHost* render_view_host,
     int instance_id,
     const std::string& src,
     const BrowserPluginHostMsg_ResizeGuest_Params& resize_params) {
   BrowserPluginGuest* guest = GetGuestByInstanceID(instance_id);
   CHECK(guest);
   GURL url(src);
   WebContentsImpl* guest_web_contents =
       static_cast<WebContentsImpl*>(guest->GetWebContents());
 
   // We do not load empty urls in web_contents.
   // If a guest sets empty src attribute after it has navigated to some
   // non-empty page, the action is considered no-op. This empty src navigation
   // should never be sent to BrowserPluginEmbedder (browser process).
   DCHECK(!src.empty());
   if (!src.empty()) {
     // TODO(creis): Check the validity of the URL: http://crbug.com/139397.
     guest_web_contents->GetController().LoadURL(url,
                                                 Referrer(),
-                                                PAGE_TRANSITION_AUTO_SUBFRAME,
+                                                PAGE_TRANSITION_AUTO_TOPLEVEL,
                                                 std::string());
   }
 
   // Resize the guest if the resize parameter was set from the renderer.
   ResizeGuest(render_view_host, instance_id, resize_params);
 }
 
 void BrowserPluginEmbedder::UpdateRectACK(int instance_id,
                                           int message_id,
                                           const gfx::Size& size) {
@@ skipping 91 matching lines @@
     WebContents* guest_web_contents = guest->GetWebContents();
 
     // Destroy the guest's web_contents.
     delete guest_web_contents;
     guest_web_contents_by_instance_id_.erase(instance_id);
   }
 }
 
 void BrowserPluginEmbedder::RenderViewDeleted(
     RenderViewHost* render_view_host) {
-  DestroyGuests();
 }
 
 void BrowserPluginEmbedder::RenderViewGone(base::TerminationStatus status) {
   DestroyGuests();
 }
 
 void BrowserPluginEmbedder::WebContentsVisibilityChanged(bool visible) {
   visible_ = visible;
   // If the embedder is hidden we need to hide the guests as well.
   for (ContainerInstanceMap::const_iterator it =
@@ skipping 59 matching lines @@
       bool visible = *Details<bool>(details).ptr();
       WebContentsVisibilityChanged(visible);
       break;
     }
     default:
       NOTREACHED() << "Unexpected notification type: " << type;
   }
 }
 
 }  // namespace content