Rename operator enums so they can be autogenerated

Camel casing is removed from the enums where it differs from the GLSL
spec. This way it's easier to autogenerate code for built-in
functions mapped to operators.

BUG=angleproject:2267
TEST=angle_unittests

Change-Id: I2490d5d0e8ffb45eba343f225f76779e63381a65
Reviewed-on: https://chromium-review.googlesource.com/929361
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
diff --git a/src/compiler/translator/OutputHLSL.cpp b/src/compiler/translator/OutputHLSL.cpp
index ecd2f76..faf6591 100644
--- a/src/compiler/translator/OutputHLSL.cpp
+++ b/src/compiler/translator/OutputHLSL.cpp
@@ -1519,7 +1519,7 @@
         case EOpSqrt:
             outputTriplet(out, visit, "sqrt(", "", ")");
             break;
-        case EOpInverseSqrt:
+        case EOpInversesqrt:
             outputTriplet(out, visit, "rsqrt(", "", ")");
             break;
         case EOpAbs:
@@ -1547,14 +1547,14 @@
         case EOpFract:
             outputTriplet(out, visit, "frac(", "", ")");
             break;
-        case EOpIsNan:
+        case EOpIsnan:
             if (node->getUseEmulatedFunction())
                 writeEmulatedFunctionTriplet(out, visit, node->getOp());
             else
                 outputTriplet(out, visit, "isnan(", "", ")");
             mRequiresIEEEStrictCompiling = true;
             break;
-        case EOpIsInf:
+        case EOpIsinf:
             outputTriplet(out, visit, "isinf(", "", ")");
             break;
         case EOpFloatBitsToInt:
@@ -2085,7 +2085,7 @@
         case EOpStep:
             outputTriplet(out, visit, "step(", ", ", ")");
             break;
-        case EOpSmoothStep:
+        case EOpSmoothstep:
             outputTriplet(out, visit, "smoothstep(", ", ", ")");
             break;
         case EOpFrexp: