Bug 1453877 - Remove unused RestyleHintData struct. r=xidorn

And fix a comment mentioning nsCSSSelectorList that I came across.

MozReview-Commit-ID: 1BOcDqV5dUr

--HG--
extra : rebase_source : 5fbdae6da74cf4fac145fbdd721723e81839e4b3

dom/base/nsDocument.cpp

@@ -1317,9 +1317,9 @@ void nsIDocument::SelectorCache::NotifyExpired(SelectorCacheKey* aSelector)
   // There is no guarantee that this method won't be re-entered when selector
   // matching is ongoing because "memory-pressure" could be notified immediately
   // when OOM happens according to the design of nsExpirationTracker.
-  // The perfect solution is to delete the |aSelector| and its nsCSSSelectorList
-  // in mTable asynchronously.
-  // We remove these objects synchronously for now because NotifiyExpired() will
+  // The perfect solution is to delete the |aSelector| and its
+  // RawServoSelectorList in mTable asynchronously.
+  // We remove these objects synchronously for now because NotifyExpired() will
   // never be triggered by "memory-pressure" which is not implemented yet in
   // the stage 2 of mozalloc_handle_oom().
   // Once these objects are removed asynchronously, we should update the warning

layout/base/nsChangeHint.h

@@ -13,8 +13,6 @@
 #include "nsDebug.h"
 #include "nsTArray.h"
 
-struct nsCSSSelector;
-
 // Defines for various style related constants
 
 enum nsChangeHint : uint32_t {
@@ -664,19 +662,4 @@ inline nsRestyleHint operator^=(nsRestyleHint& aLeft, nsRestyleHint aRight)
   return aLeft = aLeft ^ aRight;
 }
 
-namespace mozilla {
-
-/**
- * Additional data used in conjunction with an nsRestyleHint to control the
- * restyle process.
- */
-struct RestyleHintData
-{
-  // When eRestyle_SomeDescendants is used, this array contains the selectors
-  // that identify which descendants will be restyled.
-  nsTArray<nsCSSSelector*> mSelectorsForDescendants;
-};
-
-} // namespace mozilla
-
 #endif /* nsChangeHint_h___ */