X11: Use better visuals for OpenGL

ui/gl/gl_share_group.h

Index: ui/gl/gl_share_group.h
diff --git a/ui/gl/gl_share_group.h b/ui/gl/gl_share_group.h
index e991d2009dffdb0b6a47400359b08324de91230c..004dac979905e525a368e99a82529d46b4f631f9 100644
--- a/ui/gl/gl_share_group.h
+++ b/ui/gl/gl_share_group.h
@@ -15,6 +15,7 @@
 namespace gl {
 
 class GLContext;
+class GLSurface;
 
 // A group of GL contexts that share an ID namespace.
 class GL_EXPORT GLShareGroup : public base::RefCounted<GLShareGroup> {
@@ -34,10 +35,9 @@ class GL_EXPORT GLShareGroup : public base::RefCounted<GLShareGroup> {
   // 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();
+  // Sets and returns the shared GL context. Used for context virtualization.
+  virtual void SetSharedContext(GLSurface* compatible, GLContext* context);
+  virtual GLContext* GetSharedContext(GLSurface* compatible);
 
 #if defined(OS_MACOSX)
   // Sets and returns the ID of the renderer that all contexts in this share
@@ -46,11 +46,12 @@ class GL_EXPORT GLShareGroup : public base::RefCounted<GLShareGroup> {
   int GetRendererID();
 #endif
 
+ protected:
+  virtual ~GLShareGroup();
+
  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;
@@ -65,6 +66,8 @@ class GL_EXPORT GLShareGroup : public base::RefCounted<GLShareGroup> {
   DISALLOW_COPY_AND_ASSIGN(GLShareGroup);
 };
 
+GL_EXPORT GLShareGroup* CreateGLShareGroup();
+
 }  // namespace gl
 
 #endif  // UI_GL_GL_SHARE_GROUP_H_