Bug 1008336: Move MarkIfGCThingWord() and IsAddressableGCThing() inside the #ifndef that guards their only callers. r=billm

js/src/gc/RootMarking.cpp

@@ -112,6 +112,7 @@ enum ConservativeGCTest
  * Tests whether w is a (possibly dead) GC thing. Returns CGCT_VALID and
  * details about the thing if so. On failure, returns the reason for rejection.
  */
+#ifndef JSGC_USE_EXACT_ROOTING
 static inline ConservativeGCTest
 IsAddressableGCThing(JSRuntime *rt, uintptr_t w,
                      bool skipUncollectedCompartments,
@@ -231,7 +232,6 @@ MarkIfGCThingWord(JSTracer *trc, uintptr_t w)
     return CGCT_VALID;
 }
 
-#ifndef JSGC_USE_EXACT_ROOTING
 static void
 MarkWordConservatively(JSTracer *trc, uintptr_t w)
 {