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

ui/gl/gl_interface.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_INTERFACE_H_
 #define UI_GL_GL_INTERFACE_H_
 
 // This file implements glue to a GL interface so we can mock it for unit
 // testing. It has to be Desktop GL, not GLES2 as it is used to test the service
 // side code.
@@ skipping 604 matching lines @@
   virtual void FinishFenceNV(GLuint fence) = 0;
 
   virtual GLboolean IsFenceNV(GLuint fence) = 0;
 
   virtual void GetFenceivNV(GLuint fence, GLenum pname, GLint *params) = 0;
 
   virtual void SetSurfaceCHROMIUM(GLuint id) = 0;
 
   virtual GLenum GetGraphicsResetStatusARB() = 0;
 
+  virtual GLenum GetGraphicsResetStatusEXT() = 0;
+
   virtual GLsync FenceSync(GLenum condition, GLbitfield flags) = 0;
 
   virtual void DeleteSync(GLsync sync) = 0;
 
   virtual void GetSynciv(GLsync sync,
                          GLenum pname,
                          GLsizei bufSize,
                          GLsizei* length,
                          GLint* values) = 0;
 
@@ skipping 10 matching lines @@
 
   virtual void VertexAttribDivisorANGLE(GLuint index, GLuint divisor) = 0;
 
  private:
   static GLInterface* interface_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_INTERFACE_H_