Add an initial Linux GPU sandbox using the seccomp filter framework.

content/gpu/gpu_info_collector.cc

 // Copyright (c) 2011 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.
 
 #include "content/gpu/gpu_info_collector.h"
 
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 83 matching lines @@
 
   gpu_info->gl_renderer = GetGLString(GL_RENDERER);
   gpu_info->gl_vendor = GetGLString(GL_VENDOR);
   gpu_info->gl_version_string =GetGLString(GL_VERSION);
   gpu_info->gl_extensions =GetGLString(GL_EXTENSIONS);
 
   bool validGLVersionInfo = CollectGLVersionInfo(gpu_info);
   bool validVideoCardInfo = CollectVideoCardInfo(gpu_info);
   bool validDriverInfo = CollectDriverInfoGL(gpu_info);
 
+  // TODO(kbr): remove once the destruction of a current context automatically
+  // clears the current context.
+  context->ReleaseCurrent(surface.get());
+
   return (validGLVersionInfo && validVideoCardInfo && validDriverInfo);
 }
 
 bool CollectGLVersionInfo(content::GPUInfo* gpu_info) {
   std::string gl_version_string = gpu_info->gl_version_string;
   std::string glsl_version_string =
       GetGLString(GL_SHADING_LANGUAGE_VERSION);
 
   gpu_info->gl_version = GetVersionFromString(gl_version_string);
 
   std::string glsl_version = GetVersionFromString(glsl_version_string);
   gpu_info->pixel_shader_version = glsl_version;
   gpu_info->vertex_shader_version = glsl_version;
 
   return true;
 }
 
 }  // namespace gpu_info_collector