Switch all contexts in a share group to be on the same screen as the window they present to.

ui/gl/gl_share_group.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 UI_GL_GL_SHARE_GROUP_H_
 #define UI_GL_GL_SHARE_GROUP_H_
 
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 20 matching lines @@
 
   // Returns a pointer to any initialized context in the share group
   // or NULL if there are no initialized contexts in the share group.
   GLContext* GetContext();
 
   // Sets and returns the unique shared GL context. Used for context
   // virtualization.
   void SetSharedContext(GLContext* context);
   GLContext* GetSharedContext();
 
+#if defined(OS_MACOSX)
+  // Sets and returns the ID of the renderer that all contexts in this share
+  // group should be on.
+  void SetRendererID(int renderer_id);
+  int GetRendererID();
+#endif
+
  private:
   friend class base::RefCounted<GLShareGroup>;
 
   ~GLShareGroup();
 
   // References to GLContext are by raw pointer to avoid a reference count
   // cycle.
   typedef std::set<GLContext*> ContextSet;
   ContextSet contexts_;
 
   GLContext* shared_context_;
 
+#if defined(OS_MACOSX)
+  int renderer_id_;
+#endif
+
   DISALLOW_COPY_AND_ASSIGN(GLShareGroup);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_SHARE_GROUP_H_