address Chinmay's comments

Author: yjbanov

lib/ui/semantics/semantics_node.h

@@ -71,12 +71,10 @@ struct SemanticsNode {
   std::vector<int32_t> children;
 };
 
-/**
- * Contains semantic nodes that need to be updated.
- *
- * The keys in the map are stable node IDd, and the values contain
- * semantic information for the node corresponding to the ID.
- */
+// Contains semantic nodes that need to be updated.
+//
+// The keys in the map are stable node IDd, and the values contain
+// semantic information for the node corresponding to the ID.
 using SemanticsNodeUpdates = std::unordered_map<int32_t, SemanticsNode>;
 
 }  // namespace blink

shell/platform/darwin/ios/framework/Source/accessibility_bridge.mm

@@ -126,8 +126,7 @@ - (void)dealloc {
   _bridge = nullptr;
   _children.clear();
   [_parent release];
-  if (_container != nil)
-    [_container release];
+  [_container release];
   [super dealloc];
 }