Rename EOpFaceForward to EOpFaceforward.

This mirrors the spec naming and makes auto-gen a little easier.

BUG=chromium:697758

Change-Id: I9bcbc2c874b9a93a6d542aedf2b239f01ee708ce
Reviewed-on: https://chromium-review.googlesource.com/526393
Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
diff --git a/src/compiler/translator/OutputHLSL.cpp b/src/compiler/translator/OutputHLSL.cpp
index 0ee29eb..897b26b 100644
--- a/src/compiler/translator/OutputHLSL.cpp
+++ b/src/compiler/translator/OutputHLSL.cpp
@@ -1969,7 +1969,7 @@
         case EOpCross:
             outputTriplet(out, visit, "cross(", ", ", ")");
             break;
-        case EOpFaceForward:
+        case EOpFaceforward:
             ASSERT(node->getUseEmulatedFunction());
             writeEmulatedFunctionTriplet(out, visit, node->getOp());
             break;