Use EXT_robustness where available on GLES2 platforms to detect and respond to resets of the graphi…

ui/gl/gl_surface_glx.cc

 // 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.
 
 extern "C" {
 #include <X11/Xlib.h>
 }
 
 #include "ui/gl/gl_surface_glx.h"
 
@@ skipping 60 matching lines @@
   return true;
 }
 
 // static
 const char* GLSurfaceGLX::GetGLXExtensions() {
   return g_glx_extensions;
 }
 
 // static
 bool GLSurfaceGLX::HasGLXExtension(const char* name) {
-  DCHECK(name);
-  const char* c_extensions = GetGLXExtensions();
-  if (!c_extensions)
-    return false;
-  std::string extensions(c_extensions);
-  extensions += " ";
-
-  std::string delimited_name(name);
-  delimited_name += " ";
-
-  return extensions.find(delimited_name) != std::string::npos;
+  return ExtensionsContain(GetGLXExtensions(), name);
 }
 
 // static
 bool GLSurfaceGLX::IsCreateContextRobustnessSupported() {
   return g_glx_create_context_robustness_supported;
 }
 
 void* GLSurfaceGLX::GetDisplay() {
   return g_display;
 }
@@ skipping 216 matching lines @@
 
 void* PbufferGLSurfaceGLX::GetConfig() {
   return config_;
 }
 
 PbufferGLSurfaceGLX::~PbufferGLSurfaceGLX() {
   Destroy();
 }
 
 }  // namespace gfx