Workaround for Intel 6xxx clear to 0/1 bug

ui/gl/gl_driver_workarounds.cc

Index: ui/gl/gl_driver_workarounds.cc
diff --git a/ui/gl/gl_driver_workarounds.cc b/ui/gl/gl_driver_workarounds.cc
new file mode 100644
index 0000000000000000000000000000000000000000..54ed159a4d64327ca32588a64816474bf28ee6eb
--- /dev/null
+++ b/ui/gl/gl_driver_workarounds.cc
@@ -0,0 +1,13 @@
+// Copyright (c) 2017 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_driver_workarounds.h"
+
+namespace gl {
+namespace workarounds {
+
+bool clearToBoundaryValuesIsBroken = false;
+
+}  // namespace gl
+}  // namespace workarounds