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

ui/gl/gl_surface.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.
 
 #include "ui/gl/gl_surface.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 142 matching lines @@
 
 GLSurface::~GLSurface() {
   if (GetCurrent() == this)
     SetCurrent(NULL);
 }
 
 void GLSurface::SetCurrent(GLSurface* surface) {
   current_surface_.Pointer()->Set(surface);
 }
 
+bool GLSurface::ExtensionsContain(const char* c_extensions, const char* name) {
+  DCHECK(name);
+  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;
+}
+
 GLSurfaceAdapter::GLSurfaceAdapter(GLSurface* surface) : surface_(surface) {}
 
 bool GLSurfaceAdapter::Initialize() {
   return surface_->Initialize();
 }
 
 void GLSurfaceAdapter::Destroy() {
   surface_->Destroy();
 }
 
@@ skipping 61 matching lines @@
   return surface_->GetConfig();
 }
 
 unsigned GLSurfaceAdapter::GetFormat() {
   return surface_->GetFormat();
 }
 
 GLSurfaceAdapter::~GLSurfaceAdapter() {}
 
 }  // namespace gfx