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

ui/gl/gl_surface_egl.h

Index: ui/gl/gl_surface_egl.h
diff --git a/ui/gl/gl_surface_egl.h b/ui/gl/gl_surface_egl.h
index 399db431f7ca99a3bccc2dd4f1f5f9a85af98d20..85ca98cea5a289f01bcc1a39f660dd4646ee0e5a 100644
--- a/ui/gl/gl_surface_egl.h
+++ b/ui/gl/gl_surface_egl.h
@@ -41,6 +41,13 @@ class GL_EXPORT GLSurfaceEGL : public GLSurface {
   static EGLDisplay GetSoftwareDisplay();
   static EGLNativeDisplayType GetNativeDisplay();
 
+  // These aren't particularly tied to surfaces, but since we already
+  // have the static InitializeOneOff here, it's easiest to reuse its
+  // initialization guards.
+  static const char* GetEGLExtensions();
+  static bool HasEGLExtension(const char* name);
+  static bool IsCreateContextRobustnessSupported();
+
  protected:
   virtual ~GLSurfaceEGL();