Fix warnings in js/src (no bug, r=me)

js/src/frontend/BytecodeEmitter.cpp

@@ -5797,7 +5797,6 @@ EmitObject(JSContext *cx, BytecodeEmitter *bce, ParseNode *pn)
             return false;
     }
 
-    unsigned methodInits = 0, slowMethodInits = 0;
     for (ParseNode *pn2 = pn->pn_head; pn2; pn2 = pn2->pn_next) {
         /* Emit an index for t[2] for later consumption by JSOP_INITELEM. */
         ParseNode *pn3 = pn2->pn_left;

js/src/gc/Statistics.cpp

@@ -51,6 +51,8 @@
 
 #include "gc/Statistics.h"
 
+#include "gc/Barrier-inl.h"
+
 namespace js {
 namespace gcstats {