Convert GN's deps iterator to work with range-based for loops.

tools/gn/binary_target_generator.cc

Index: tools/gn/binary_target_generator.cc
diff --git a/tools/gn/binary_target_generator.cc b/tools/gn/binary_target_generator.cc
index 73f7cd26716519ab237b1a1491b9b9d15c124764..d73c76e3dab4da10c586a1a67b14349204cd3d1b 100644
--- a/tools/gn/binary_target_generator.cc
+++ b/tools/gn/binary_target_generator.cc
@@ -120,9 +120,8 @@ bool BinaryTargetGenerator::FillAllowCircularIncludesFrom() {
   // Validate that all circular includes entries are in the deps.
   for (size_t circular_i = 0; circular_i < circular.size(); circular_i++) {
     bool found_dep = false;
-    for (DepsIterator iter(target_, DepsIterator::LINKED_ONLY);
-         !iter.done(); iter.Advance()) {
-      if (iter.label() == circular[circular_i]) {
+    for (const auto& dep_pair : target_->GetDeps(Target::DEPS_LINKED)) {
+      if (dep_pair.label == circular[circular_i]) {
         found_dep = true;
         break;
       }