Initialize BrowserPluginGuest to attach to the View hierarchy

content/public/browser/browser_plugin_guest_delegate.h

 // Copyright 2013 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.
 
 #ifndef CONTENT_PUBLIC_BROWSER_BROWSER_PLUGIN_GUEST_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_BROWSER_PLUGIN_GUEST_DELEGATE_H_
 
 #include "base/callback_forward.h"
 #include "base/process/kill.h"
 #include "content/common/content_export.h"
@@ skipping 18 matching lines @@
   // Notification that the embedder will begin attachment. This is called
   // prior to resuming resource loads. |element_instance_id| uniquely identifies
   // the element that will serve as a container for the guest.
   virtual void WillAttach(content::WebContents* embedder_web_contents,
                           int element_instance_id,
                           bool is_full_page_plugin) {}
 
   virtual WebContents* CreateNewGuestWindow(
       const WebContents::CreateParams& create_params);
 
+  // Asks the delegate whether this guest can run while detached from a
+  // container. A detached guest is a WebContents that has no visual surface
+  // into which it can composite its content. Detached guests can be thought
+  // of as workers with a DOM.
+  virtual bool CanRunInDetachedState() const;
+
   // Notification that the embedder has completed attachment. The
   // |guest_proxy_routing_id| is the routing ID for the RenderView in the
   // embedder that will serve as a contentWindow proxy for the guest.
   virtual void DidAttach(int guest_proxy_routing_id) {}
 
   // Notification that the guest has detached from its container.
   virtual void DidDetach() {}
 
   // Notification that the BrowserPlugin has resized.
   virtual void ElementSizeChanged(const gfx::Size& old_size,
                                   const gfx::Size& new_size) {}
 
+  // Returns the WebContents that currently owns this guest.
+  virtual WebContents* GetOwnerWebContents() const;
+
   // Notifies that the content size of the guest has changed.
   // Note: In autosize mode, it si possible that the guest size may not match
   // the element size.
   virtual void GuestSizeChanged(const gfx::Size& old_size,
                                 const gfx::Size& new_size) {}
 
   // Asks the delegate if the given guest can lock the pointer.
   // Invoking the |callback| synchronously is OK.
   virtual void RequestPointerLockPermission(
       bool user_gesture,
       bool last_unlocked_by_target,
       const base::Callback<void(bool)>& callback) {}
 
   // Registers a |callback| with the delegate that the delegate would call when
   // it is about to be destroyed.
   typedef base::Callback<void()> DestructionCallback;
   virtual void RegisterDestructionCallback(
       const DestructionCallback& callback) {}
 
   // Find the given |search_text| in the page. Returns true if the find request
   // is handled by this browser plugin guest delegate.
   virtual bool Find(int request_id,
                     const base::string16& search_text,
                     const blink::WebFindOptions& options);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_PLUGIN_GUEST_DELEGATE_H_