GuestView: Fix message routing across embedder navigations

content/browser/browser_plugin/browser_plugin_embedder.cc

Index: content/browser/browser_plugin/browser_plugin_embedder.cc
diff --git a/content/browser/browser_plugin/browser_plugin_embedder.cc b/content/browser/browser_plugin/browser_plugin_embedder.cc
index 5313268a62405ca70663c29dd504a43baa501847..9aa73fae244d53d16dde11a919620386e8737497 100644
--- a/content/browser/browser_plugin/browser_plugin_embedder.cc
+++ b/content/browser/browser_plugin/browser_plugin_embedder.cc
@@ -139,7 +139,8 @@ void BrowserPluginEmbedder::OnAttach(
     const BrowserPluginHostMsg_Attach_Params& params) {
   WebContents* guest_web_contents =
       GetBrowserPluginGuestManager()->GetGuestByInstanceID(
-          GetWebContents(), browser_plugin_instance_id);
+          GetWebContents()->GetRenderProcessHost()->GetID(),

[Charlie Reis, 2015/02/12 21:38:05]

This won't work well with OOPIF, since a WebContents can have many
RenderProcessHosts.

Is there any way to know which RenderFrameHost this is coming from?  That's a
better place to get the process ID.

[Fady Samuel, 2015/02/13 01:22:13]

Done.

+          browser_plugin_instance_id);
   if (!guest_web_contents)
     return;
   BrowserPluginGuest* guest = static_cast<WebContentsImpl*>(guest_web_contents)