--- a/js/src/jscompartment.cpp
+++ b/js/src/jscompartment.cpp
@@ -46,17 +46,16 @@ JSCompartment::JSCompartment(Zone *zone,
     isSelfHosting(false),
     marked(true),
     addonId(options.addonIdOrNull()),
 #ifdef DEBUG
     firedOnNewGlobalObject(false),
 #endif
     global_(nullptr),
     enterCompartmentDepth(0),
-    totalTime(0),
     data(nullptr),
     objectMetadataCallback(nullptr),
     lastAnimationTime(0),
     regExps(runtime_),
     globalWriteBarriered(false),
     neuteredTypedObjects(0),
     propertyTree(thisForCtor()),
     selfHostingScriptSource(nullptr),

--- a/js/src/jscompartment.h
+++ b/js/src/jscompartment.h
@@ -9,17 +9,16 @@
 
 #include "mozilla/MemoryReporting.h"
 
 #include "builtin/RegExp.h"
 #include "gc/Zone.h"
 #include "vm/GlobalObject.h"
 #include "vm/PIC.h"
 #include "vm/SavedStacks.h"
-#include "prmjtime.h"
 
 namespace js {
 
 namespace jit {
 class JitCompartment;
 }
 
 namespace gc {
@@ -162,32 +161,20 @@ struct JSCompartment
 
   private:
     friend struct JSRuntime;
     friend struct JSContext;
     friend class js::ExclusiveContext;
     js::ReadBarrieredGlobalObject global_;
 
     unsigned                     enterCompartmentDepth;
-    int64_t                      startInterval;
 
   public:
-    int64_t                      totalTime;
-    void enter() {
-        if (addonId && !enterCompartmentDepth) {
-            startInterval = PRMJ_Now();
-        }
-        enterCompartmentDepth++;
-    }
-    void leave() {
-        enterCompartmentDepth--;
-        if (addonId && !enterCompartmentDepth) {
-            totalTime += (PRMJ_Now() - startInterval);
-        }
-    }
+    void enter() { enterCompartmentDepth++; }
+    void leave() { enterCompartmentDepth--; }
     bool hasBeenEntered() { return !!enterCompartmentDepth; }
 
     JS::Zone *zone() { return zone_; }
     const JS::Zone *zone() const { return zone_; }
     JS::CompartmentOptions &options() { return options_; }
     const JS::CompartmentOptions &options() const { return options_; }
 
     JSRuntime *runtimeFromMainThread() {