Adds capture to the mojo window_manager.

mojo/services/view_manager/public/cpp/view.h

 // 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.
 
 #ifndef MOJO_SERVICES_VIEW_MANAGER_PUBLIC_CPP_VIEW_H_
 #define MOJO_SERVICES_VIEW_MANAGER_PUBLIC_CPP_VIEW_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 85 matching lines @@
   bool IsDrawn() const;
 
   // Observation.
   void AddObserver(ViewObserver* observer);
   void RemoveObserver(ViewObserver* observer);
 
   // Tree.
   View* parent() { return parent_; }
   const View* parent() const { return parent_; }
   const Children& children() const { return children_; }
+  View* GetRoot() {
+    return const_cast<View*>(const_cast<const View*>(this)->GetRoot());
+  }
   const View* GetRoot() const;
 
   void AddChild(View* child);
   void RemoveChild(View* child);
 
   void Reorder(View* relative, OrderDirection direction);
   void MoveToFront();
   void MoveToBack();
 
   bool Contains(View* child) const;
@@ skipping 77 matching lines @@
   };
 
   std::map<const void*, Value> prop_map_;
 
   DISALLOW_COPY_AND_ASSIGN(View);
 };
 
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_VIEW_MANAGER_PUBLIC_CPP_VIEW_H_