Remove more global handles dead code

Bug: chromium:720477
Change-Id: I49af460d06f045731d847d68b7276edae72d95a4
Reviewed-on: https://chromium-review.googlesource.com/509690Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45431}

src/global-handles.cc

@@ -647,26 +647,6 @@ void GlobalHandles::IterateNewSpaceStrongAndDependentRoots(RootVisitor* v) {
   }
 }
 
-void GlobalHandles::IterateNewSpaceWeakIndependentRoots(RootVisitor* v) {
-  for (int i = 0; i < new_space_nodes_.length(); ++i) {
-    Node* node = new_space_nodes_[i];
-    DCHECK(node->is_in_new_space_list());
-    if (node->is_independent() && node->IsWeakRetainer()) {
-      // Pending weak phantom handles die immediately. Everything else survives.
-      if (node->IsPendingPhantomResetHandle()) {
-        node->ResetPhantomHandle();
-        ++number_of_phantom_handle_resets_;
-      } else if (node->IsPendingPhantomCallback()) {
-        node->CollectPhantomCallbackData(isolate(),
-                                         &pending_phantom_callbacks_);
-      } else {
-        v->VisitRootPointer(Root::kGlobalHandles, node->location());
-      }
-    }
-  }
-}
-
-
 void GlobalHandles::IdentifyWeakUnmodifiedObjects(
     WeakSlotCallback is_unmodified) {
   for (int i = 0; i < new_space_nodes_.length(); ++i) {

src/global-handles.h

@@ -145,10 +145,6 @@ class GlobalHandles {
   // Iterates over strong and dependent handles. See the node above.
   void IterateNewSpaceStrongAndDependentRoots(RootVisitor* v);
 
-  // Iterates over weak independent or partially independent handles.
-  // See the note above.
-  void IterateNewSpaceWeakIndependentRoots(RootVisitor* v);
-
   // Finds weak independent or unmodified handles satisfying
   // the callback predicate and marks them as pending. See the note above.
   void MarkNewSpaceWeakUnmodifiedObjectsPending(