Bug 1590845 - Add JS::MemoryUse::Embedding1 through 5. r=tcampbell,jonco

This makes JS::AddAssociatedMemory() and JS::RemoveAssociatedMemory()
more useful for embedders.

Differential Revision: https://phabricator.services.mozilla.com/D50347

--HG--
extra : moz-landing-system : lando

js/public/MemoryFunctions.h

@@ -65,7 +65,12 @@ namespace JS {
   _(CDataBuffer)                         \
   _(CClosureInfo)                        \
   _(CTypesInt64)                         \
-  _(PerfMeasurement)
+  _(PerfMeasurement)                     \
+  _(Embedding1)                          \
+  _(Embedding2)                          \
+  _(Embedding3)                          \
+  _(Embedding4)                          \
+  _(Embedding5)
 
 enum class MemoryUse : uint8_t {
 #define DEFINE_MEMORY_USE(Name) Name,