Bug 1320989 - Remove unused state in GCRuntime related to dead zones r=sfink

js/src/gc/GCRuntime.h

@@ -790,14 +790,6 @@ class GCRuntime
 
     void setFullCompartmentChecks(bool enable);
 
-    bool isManipulatingDeadZones() { return manipulatingDeadZones; }
-    void setManipulatingDeadZones(bool value) { manipulatingDeadZones = value; }
-    unsigned objectsMarkedInDeadZonesCount() { return objectsMarkedInDeadZones; }
-    void incObjectsMarkedInDeadZone() {
-        MOZ_ASSERT(manipulatingDeadZones);
-        ++objectsMarkedInDeadZones;
-    }
-
     JS::Zone* getCurrentZoneGroup() { return currentZoneGroup; }
     void setFoundBlackGrayEdges(TenuredCell& target) {
         AutoEnterOOMUnsafeRegion oomUnsafe;
@@ -1287,23 +1279,6 @@ class GCRuntime
      */
     unsigned compactingDisabledCount;
 
-    /*
-     * This is true if we are in the middle of a brain transplant (e.g.,
-     * JS_TransplantObject) or some other operation that can manipulate
-     * dead zones.
-     */
-    bool manipulatingDeadZones;
-
-    /*
-     * This field is incremented each time we mark an object inside a
-     * zone with no incoming cross-compartment pointers. Typically if
-     * this happens it signals that an incremental GC is marking too much
-     * stuff. At various times we check this counter and, if it has changed, we
-     * run an immediate, non-incremental GC to clean up the dead
-     * zones. This should happen very rarely.
-     */
-    unsigned objectsMarkedInDeadZones;
-
     bool poked;
 
     /*

js/src/jsgc.cpp

@@ -857,8 +857,6 @@ GCRuntime::GCRuntime(JSRuntime* rt) :
     generationalDisabled(0),
     compactingEnabled(true),
     compactingDisabledCount(0),
-    manipulatingDeadZones(false),
-    objectsMarkedInDeadZones(0),
     poked(false),
 #ifdef JS_GC_ZEAL
     zealModeBits(0),