Add remaining transform feedback queries.

BUG=angle:493

Change-Id: I8841af50dcb90e7fb8a811b95d015bfdd2c5d226
Reviewed-on: https://chromium-review.googlesource.com/191035
Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/libGLESv2/Program.cpp b/src/libGLESv2/Program.cpp
index c9da1a3..c701716 100644
--- a/src/libGLESv2/Program.cpp
+++ b/src/libGLESv2/Program.cpp
@@ -573,4 +573,22 @@
     }
 }
 
+GLsizei Program::getTransformFeedbackVaryingCount() const
+{
+    UNIMPLEMENTED();
+    return 0;
+}
+
+GLsizei Program::getTransformFeedbackVaryingMaxLength() const
+{
+    UNIMPLEMENTED();
+    return 0;
+}
+
+GLenum Program::getTransformFeedbackBufferMode() const
+{
+    UNIMPLEMENTED();
+    return GL_NONE;
+}
+
 }