Add WebGL validation extensions to ANGLE.

BUG=angleproject:1523

Change-Id: I6fecb5055ed8087665aeee34b3a066ea8f38d51b
Reviewed-on: https://chromium-review.googlesource.com/386281
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
diff --git a/src/tests/test_utils/ANGLETest.cpp b/src/tests/test_utils/ANGLETest.cpp
index 1a9d8b5..7bec1e1 100644
--- a/src/tests/test_utils/ANGLETest.cpp
+++ b/src/tests/test_utils/ANGLETest.cpp
@@ -643,6 +643,11 @@
     mEGLWindow->setNoErrorEnabled(enabled);
 }
 
+void ANGLETest::setWebGLCompatibilityEnabled(bool webglCompatibility)
+{
+    mEGLWindow->setWebGLCompatibilityEnabled(webglCompatibility);
+}
+
 int ANGLETest::getClientMajorVersion() const
 {
     return mEGLWindow->getClientMajorVersion();