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

extensions/browser/guest_view/guest_view_base.cc

Index: extensions/browser/guest_view/guest_view_base.cc
diff --git a/extensions/browser/guest_view/guest_view_base.cc b/extensions/browser/guest_view/guest_view_base.cc
index fac9da30b30b18006555599903e2beb5eab88c66..1b0effef18fdab97b0221b2e49f8327ea738895f 100644
--- a/extensions/browser/guest_view/guest_view_base.cc
+++ b/extensions/browser/guest_view/guest_view_base.cc
@@ -385,6 +385,22 @@ void GuestViewBase::WebContentsDestroyed() {
   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())