Initialize BrowserPluginGuest to attach to the View hierarchy

extensions/browser/guest_view/guest_view_base.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_base.h"
 
 #include "base/lazy_instance.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/render_frame_host.h"
@@ skipping 317 matching lines @@
       owner_web_contents()->GetMainFrame()->GetRoutingID(),
       element_instance_id_));
   element_instance_id_ = guestview::kInstanceIDNone;
 }
 
 void GuestViewBase::ElementSizeChanged(const gfx::Size& old_size,
                                        const gfx::Size& new_size) {
   element_size_ = new_size;
 }
 
+WebContents* GuestViewBase::GetOwnerWebContents() const {
+  return owner_web_contents_;
+}
+
 void GuestViewBase::GuestSizeChanged(const gfx::Size& old_size,
                                      const gfx::Size& new_size) {
   if (!auto_size_enabled_)
     return;
   guest_size_ = new_size;
   GuestSizeChangedDueToAutoSize(old_size, new_size);
 }
 
 const GURL& GuestViewBase::GetOwnerSiteURL() const {
   return owner_web_contents()->GetLastCommittedURL();
@@ skipping 182 matching lines @@
 
 // static
 void GuestViewBase::RegisterGuestViewTypes() {
   AppViewGuest::Register();
   ExtensionOptionsGuest::Register();
   MimeHandlerViewGuest::Register();
   WebViewGuest::Register();
 }
 
 }  // namespace extensions