Implement GL_KHR_debug.

BUG=angleproject:520

Change-Id: I9ced3e7ab1515feddf2ec103c26b2610a45b1784
Reviewed-on: https://chromium-review.googlesource.com/319830
Tryjob-Request: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/tests/test_utils/ANGLETest.cpp b/src/tests/test_utils/ANGLETest.cpp
index ffc1ec1..7ead125 100644
--- a/src/tests/test_utils/ANGLETest.cpp
+++ b/src/tests/test_utils/ANGLETest.cpp
@@ -223,6 +223,11 @@
     mEGLWindow->setMultisample(enabled);
 }
 
+void ANGLETest::setDebugEnabled(bool enabled)
+{
+    mEGLWindow->setDebugEnabled(enabled);
+}
+
 int ANGLETest::getClientVersion() const
 {
     return mEGLWindow->getClientMajorVersion();