GuestView: Double clicking a GuestView type in task manager should activate the embedder.

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/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
@@ skipping 367 matching lines @@
   } else {
     rvh->DisableAutoResize(element_size_);
   }
 }
 
 void GuestViewBase::WebContentsDestroyed() {
   GuestDestroyed();
   delete this;
 }
 
+void GuestViewBase::ActivateContents(WebContents* web_contents) {
+  if (!attached() || !embedder_web_contents()->GetDelegate())
+    return;
+
+  embedder_web_contents()->GetDelegate()->ActivateContents(
+      embedder_web_contents());
+}
+
+void GuestViewBase::DeactivateContents(WebContents* web_contents) {
+  if (!attached() || !embedder_web_contents()->GetDelegate())
+    return;
+
+  embedder_web_contents()->GetDelegate()->DeactivateContents(
+      embedder_web_contents());
+}
+
 void GuestViewBase::RunFileChooser(WebContents* web_contents,
                                    const content::FileChooserParams& params) {
   if (!attached() || !embedder_web_contents()->GetDelegate())
     return;
 
   embedder_web_contents()->GetDelegate()->RunFileChooser(web_contents, params);
 }
 
 bool GuestViewBase::ShouldFocusPageAfterCrash() {
   // Focus is managed elsewhere.
@@ skipping 62 matching lines @@
 
 // static
 void GuestViewBase::RegisterGuestViewTypes() {
   AppViewGuest::Register();
   ExtensionOptionsGuest::Register();
   MimeHandlerViewGuest::Register();
   WebViewGuest::Register();
 }
 
 }  // namespace extensions