Make <webview> use out-of-process iframe architecture.

extensions/browser/guest_view/guest_view_manager.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 "extensions/browser/guest_view/guest_view_manager.h"
 
 #include "base/strings/stringprintf.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
@@ skipping 58 matching lines @@
 content::WebContents* GuestViewManager::GetGuestByInstanceIDSafely(
     int guest_instance_id,
     int embedder_render_process_id) {
   if (!CanEmbedderAccessInstanceIDMaybeKill(embedder_render_process_id,
                                             guest_instance_id)) {
     return nullptr;
   }
   return GetGuestByInstanceID(guest_instance_id);
 }
 
+content::WebContents* GuestViewManager::GetGuestByInstanceIDHack(
+    int guest_instance_id) {
+  return GetGuestByInstanceID(guest_instance_id);
+}
+
 void GuestViewManager::AttachGuest(int embedder_process_id,
                                    int element_instance_id,
                                    int guest_instance_id,
                                    const base::DictionaryValue& attach_params) {
   auto guest_view = GuestViewBase::From(embedder_process_id, guest_instance_id);
   if (!guest_view)
     return;
 
   ElementInstanceKey key(embedder_process_id, element_instance_id);
   auto it = instance_id_map_.find(key);
@@ skipping 277 matching lines @@
   return element_instance_id < other.element_instance_id;
 }
 
 bool GuestViewManager::ElementInstanceKey::operator==(
     const GuestViewManager::ElementInstanceKey& other) const {
   return (embedder_process_id == other.embedder_process_id) &&
     (element_instance_id == other.element_instance_id);
 }
 
 }  // namespace extensions