Implement pointer lock across outer/inner WebContents.

content/browser/renderer_host/render_widget_host_delegate.h

 // Copyright (c) 2012 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_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 22 matching lines @@
 class Sample;
 }
 
 namespace content {
 
 class BrowserAccessibilityManager;
 class RenderWidgetHostImpl;
 class RenderWidgetHostInputEventRouter;
 class RenderViewHostDelegateView;
 class TextInputManager;
+class WebContents;
 struct ScreenInfo;
 struct NativeWebKeyboardEvent;
 
 //
 // RenderWidgetHostDelegate
 //
 //  An interface implemented by an object interested in knowing about the state
 //  of the RenderWidgetHost.
 class CONTENT_EXPORT RenderWidgetHostDelegate {
  public:
@@ skipping 184 matching lines @@
   // |render_widget_host| is focused and that its owning WebContents is also
   // the focused WebContents.
   virtual void FocusOwningWebContents(
       RenderWidgetHostImpl* render_widget_host) {}
 
   // Augment a Rappor sample with eTLD+1 context. The caller is still
   // responsible for logging the sample to the RapporService. Returns false
   // if the eTLD+1 is not known for |render_widget_host|.
   virtual bool AddDomainInfoToRapporSample(rappor::Sample* sample);
 
+  // Return this object cast to a WebContents, if it is one. If the object is
+  // not a WebContents, returns nullptr.
+  virtual WebContents* GetAsWebContents();
+
  protected:
   virtual ~RenderWidgetHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_DELEGATE_H_