Web: Use isEsProfile() instead of run-time testing; remove more atomics

Saves 2.5K, and design is better.

glslang/MachineIndependent/localintermediate.h

@@ -460,6 +460,7 @@ public:
 #ifdef GLSLANG_WEB
     void output(TInfoSink&, bool tree) { }
 
+    bool isEsProfile() const { return false; }
     bool getXfbMode() const { return false; }
     bool isMultiStream() const { return false; }
     TLayoutGeometry getOutputPrimitive() const { return ElgNone; }
@@ -483,6 +484,8 @@ public:
 #else
     void output(TInfoSink&, bool tree);
 
+    bool isEsProfile() const { return profile == EEsProfile; }
+
     void setShiftBinding(TResourceType res, unsigned int shift)
     {
         shiftBinding[res] = shift;