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/ParseHelper.h

@@ -150,8 +150,10 @@ public:
             extensionCallback(line, extension, behavior);
     }
 
+#ifdef ENABLE_HLSL
     // Manage the global uniform block (default uniforms in GLSL, $Global in HLSL)
     virtual void growGlobalUniformBlock(const TSourceLoc&, TType&, const TString& memberName, TTypeList* typeList = nullptr);
+#endif
 
     // Potentially rename shader entry point function
     void renameShaderFunction(TString*& name) const