Collect GL_EXTENSIONS string in GPUInfo and display it in about:gpu page....

chrome/common/gpu_info.h

 // Copyright (c) 2006-2010 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 CHROME_COMMON_GPU_INFO_H__
 #define CHROME_COMMON_GPU_INFO_H__
 #pragma once
 
 // Provides access to the GPU information for the system
 // on which chrome is currently running.
@@ skipping 61 matching lines @@
   std::string gl_version_string() const;
 
   // Return the GL_VENDOR string.
   // Return "" if we are not using OpenGL.
   std::string gl_vendor() const;
 
   // Return the GL_RENDERER string.
   // Return "" if we are not using OpenGL.
   std::string gl_renderer() const;
 
+  // Return the GL_EXTENSIONS string.
+  // Return "" if we are not using OpenGL.
+  std::string gl_extensions() const;
+
   // Return the device semantics, i.e. whether the Vista and Windows 7 specific
   // semantics are available.
   bool can_lose_context() const;
 
   void SetProgress(Progress progress);
 
   void SetInitializationTime(const base::TimeDelta& initialization_time);
 
   void SetVideoCardInfo(uint32 vendor_id, uint32 device_id);
 
   void SetDriverInfo(const std::string& driver_vendor,
                      const std::string& driver_version);
 
   void SetShaderVersion(uint32 pixel_shader_version,
                         uint32 vertex_shader_version);
 
   void SetGLVersion(uint32 gl_version);
 
   void SetGLVersionString(const std::string& gl_vendor_string);
 
   void SetGLVendor(const std::string& gl_vendor);
 
   void SetGLRenderer(const std::string& gl_renderer);
 
+  void SetGLExtensions(const std::string& gl_extensions);
+
   void SetCanLoseContext(bool can_lose_context);
 
 #if defined(OS_WIN)
   // The information returned by the DirectX Diagnostics Tool.
   const DxDiagNode& dx_diagnostics() const;
 
   void SetDxDiagnostics(const DxDiagNode& dx_diagnostics);
 #endif
 
  private:
   Progress progress_;
   base::TimeDelta initialization_time_;
   uint32 vendor_id_;
   uint32 device_id_;
   std::string driver_vendor_;
   std::string driver_version_;
   uint32 pixel_shader_version_;
   uint32 vertex_shader_version_;
   uint32 gl_version_;
   std::string gl_version_string_;
   std::string gl_vendor_;
   std::string gl_renderer_;
+  std::string gl_extensions_;
   bool can_lose_context_;
 
 #if defined(OS_WIN)
   DxDiagNode dx_diagnostics_;
 #endif
 };
 
 #endif  // CHROME_COMMON_GPU_INFO_H__