Web: Change a bunch of HLSL methods from dynamic to compile-time known.

This saves about 7K.
By changing just a few methods to be compile-time known, a bunch of
scattered code becomes DCE.

glslang/MachineIndependent/ParseContextBase.cpp

@@ -574,6 +574,7 @@ void TParseContextBase::parseSwizzleSelector(const TSourceLoc& loc, const TStrin
         selector.push_back(0);
 }
 
+#ifdef ENABLE_HLSL
 //
 // Make the passed-in variable information become a member of the
 // global uniform block.  If this doesn't exist yet, make it.
@@ -618,6 +619,7 @@ void TParseContextBase::growGlobalUniformBlock(const TSourceLoc& loc, TType& mem
 
     ++firstNewMember;
 }
+#endif
 
 void TParseContextBase::finish()
 {