X11: Use better visuals for OpenGL

ui/gl/gl_surface.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_SURFACE_H_
 #define UI_GL_GL_SURFACE_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 142 matching lines @@
   // if this is not possible.
   virtual void* GetShareHandle();
 
   // Get the platform specific display on which this surface resides, if
   // available.
   virtual void* GetDisplay();
 
   // Get the platfrom specific configuration for this surface, if available.
   virtual void* GetConfig();
 
+  // Get the key corresponding to the set of GLSurfaces that can be made current
+  // with this GLSurface.
+  virtual unsigned long GetCompatibilityKey();
+
   // Get the GL pixel format of the surface, if available.
   virtual GLSurface::Format GetFormat();
 
   // Get access to a helper providing time of recent refresh and period
   // of screen refresh. If unavailable, returns NULL.
   virtual gfx::VSyncProvider* GetVSyncProvider();
 
   // Schedule an overlay plane to be shown at swap time, or on the next
   // CommitOverlayPlanes call.
   // |z_order| specifies the stacking order of the plane relative to the
@@ skipping 87 matching lines @@
   bool SupportsAsyncSwap() override;
   gfx::Size GetSize() override;
   void* GetHandle() override;
   unsigned int GetBackingFramebufferObject() override;
   bool OnMakeCurrent(GLContext* context) override;
   bool SetBackbufferAllocation(bool allocated) override;
   void SetFrontbufferAllocation(bool allocated) override;
   void* GetShareHandle() override;
   void* GetDisplay() override;
   void* GetConfig() override;
+  unsigned long GetCompatibilityKey() override;
   GLSurface::Format GetFormat() override;
   gfx::VSyncProvider* GetVSyncProvider() override;
   bool ScheduleOverlayPlane(int z_order,
                             gfx::OverlayTransform transform,
                             GLImage* image,
                             const gfx::Rect& bounds_rect,
                             const gfx::RectF& crop_rect) override;
   bool IsSurfaceless() const override;
   bool FlipsVertically() const override;
   bool BuffersFlipped() const override;
@@ skipping 11 matching lines @@
 
 // Wraps GLSurface in scoped_refptr and tries to initializes it. Returns a
 // scoped_refptr containing the initialized GLSurface or nullptr if
 // initialization fails.
 GL_EXPORT scoped_refptr<GLSurface> InitializeGLSurface(
     scoped_refptr<GLSurface> surface);
 
 }  // namespace gl
 
 #endif  // UI_GL_GL_SURFACE_H_