Bug 1288870, part 3 - Remove the now-vestigial Mark code for XPCNativeInterface. r=billm

XPCNativeInterface::Mark(), Unmark() and IsMarked() don't do anything
any more, so anything that calls them can be deleted. This removes the
only use of XPCCallContext::CanGetInterface(), so delete that, too.

MozReview-Commit-ID: 4w3aPTVXNDI

js/xpconnect/src/XPCInlines.h

@@ -119,12 +119,6 @@ XPCCallContext::GetSet() const
     return mSet;
 }
 
-inline bool
-XPCCallContext::CanGetInterface() const
-{
-    return mState >= HAVE_NAME;
-}
-
 inline XPCNativeInterface*
 XPCCallContext::GetInterface() const
 {
@@ -442,26 +436,13 @@ XPCNativeSet::MatchesSetUpToInterface(const XPCNativeSet* other,
 
 inline void XPCNativeSet::Mark()
 {
-    if (IsMarked())
-        return;
-
-    XPCNativeInterface* const * pp = mInterfaces;
-
-    for (int i = (int) mInterfaceCount; i > 0; i--, pp++)
-        (*pp)->Mark();
-
-    MarkSelfOnly();
+    mMarked = 1;
 }
 
 #ifdef DEBUG
 inline void XPCNativeSet::ASSERT_NotMarked()
 {
     MOZ_ASSERT(!IsMarked(), "bad");
-
-    XPCNativeInterface* const * pp = mInterfaces;
-
-    for (int i = (int) mInterfaceCount; i > 0; i--, pp++)
-        MOZ_ASSERT(!(*pp)->IsMarked(), "bad");
 }
 #endif
 

js/xpconnect/src/XPCJSRuntime.cpp

@@ -804,11 +804,6 @@ XPCJSRuntime::FinalizeCallback(JSFreeOp* fop,
                         if (set)
                             set->Mark();
                     }
-                    if (ccxp->CanGetInterface()) {
-                        XPCNativeInterface* iface = ccxp->GetInterface();
-                        if (iface)
-                            iface->Mark();
-                    }
                     ccxp = ccxp->GetPrevCallContext();
                 }
             }

js/xpconnect/src/xpcprivate.h

@@ -1242,10 +1242,6 @@ class XPCNativeInterface final
 
     void DebugDump(int16_t depth);
 
-    void Mark() {}
-    void Unmark() {}
-    bool IsMarked() const { return false; }
-
     size_t SizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf);
 
   protected:
@@ -1364,11 +1360,6 @@ class XPCNativeSet final
     inline void TraceJS(JSTracer* trc) {}
     inline void AutoTrace(JSTracer* trc) {}
 
-  private:
-    void MarkSelfOnly() {
-        mMarked = 1;
-    }
-
   public:
     void Unmark() {
         mMarked = 0;