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

This is a useful debug aid and better matches the behavior of tabs.

BUG=none

Review URL: https://codereview.chromium.org/564933002

Cr-Commit-Position: refs/heads/master@{#294443}

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())

extensions/browser/guest_view/guest_view_base.h

@@ -273,6 +273,9 @@ class GuestViewBase : public content::BrowserPluginGuestDelegate,
   virtual void WebContentsDestroyed() OVERRIDE FINAL;
 
   // WebContentsDelegate implementation.
+  virtual void ActivateContents(content::WebContents* contents) OVERRIDE FINAL;
+  virtual void DeactivateContents(
+      content::WebContents* contents) OVERRIDE FINAL;
   virtual void RunFileChooser(
       content::WebContents* web_contents,
       const content::FileChooserParams& params) OVERRIDE;