Support window.opener after a process swap.

chrome/renderer/chrome_render_view_observer.cc

Index: chrome/renderer/chrome_render_view_observer.cc
diff --git a/chrome/renderer/chrome_render_view_observer.cc b/chrome/renderer/chrome_render_view_observer.cc
index c397ac6775629b46a2c879d9d390d587d74a4575..e4053f88057aee3edbd14e3dc65883056caa7f84 100644
--- a/chrome/renderer/chrome_render_view_observer.cc
+++ b/chrome/renderer/chrome_render_view_observer.cc
@@ -164,6 +164,16 @@ bool ChromeRenderViewObserver::OnMessageReceived(const IPC::Message& message) {
   return handled;
 }
 
+bool ChromeRenderViewObserver::CanSendWhileSwappedOut(IPC::Message* message) {
+  switch (message->type()) {
+    case ViewHostMsg_DomOperationResponse::ID:
+      return true;
+    default:
+      break;
+  }
+  return false;
+}
+
 void ChromeRenderViewObserver::OnCaptureSnapshot() {
   SkBitmap snapshot;
   bool error = false;