Bug 1461450 - Part 1: Add move constructors and assignment operators to nsTArray, r=froydnj

xpcom/ds/nsTArray.h

@@ -2535,6 +2535,13 @@ public:
     this->AppendElements(aOther);
   }
 
+  AutoTArray(self_type&& aOther)
+    : nsTArray<E>()
+  {
+    Init();
+    this->SwapElements(aOther);
+  }
+
   explicit AutoTArray(const base_type& aOther)
     : mAlign()
   {
@@ -2569,6 +2576,12 @@ public:
     return *this;
   }
 
+  self_type& operator=(self_type&& aOther)
+  {
+    base_type::operator=(std::move(aOther));
+    return *this;
+  }
+
   template<typename Allocator>
   self_type& operator=(const nsTArray_Impl<elem_type, Allocator>& aOther)
   {