Force MimeHandlerView to always use BrowserPlugin

content/public/browser/browser_plugin_guest_delegate.cc

 // Copyright 2014 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/public/browser/browser_plugin_guest_delegate.h"
 
 namespace content {
 
 bool BrowserPluginGuestDelegate::CanRunInDetachedState() const {
   return false;
@@ skipping 14 matching lines @@
     const base::string16& search_text,
     const blink::WebFindOptions& options) {
   return false;
 }
 
 bool BrowserPluginGuestDelegate::HandleStopFindingForEmbedder(
     StopFindAction action) {
   return false;
 }
 
+bool BrowserPluginGuestDelegate::CanUseCrossProcessFrames() {
+  return true;
+}
+
 }  // namespace content