blink_gc_plugin: retire overloaded traceImpl detection and handling.

tools/clang/blink_gc_plugin/BlinkGCPluginConsumer.cpp

Index: tools/clang/blink_gc_plugin/BlinkGCPluginConsumer.cpp
diff --git a/tools/clang/blink_gc_plugin/BlinkGCPluginConsumer.cpp b/tools/clang/blink_gc_plugin/BlinkGCPluginConsumer.cpp
index c3e277a7ae16c83f85eaba86dd7c772e4181c2f9..c15b8e8f2bb7e9454b7482e0f08a730cdec83055 100644
--- a/tools/clang/blink_gc_plugin/BlinkGCPluginConsumer.cpp
+++ b/tools/clang/blink_gc_plugin/BlinkGCPluginConsumer.cpp
@@ -528,7 +528,6 @@ void BlinkGCPluginConsumer::CheckTraceOrDispatchMethod(
     CXXMethodDecl* method) {
   Config::TraceMethodType trace_type = Config::GetTraceMethodType(method);
   if (trace_type == Config::TRACE_AFTER_DISPATCH_METHOD ||
-      trace_type == Config::TRACE_AFTER_DISPATCH_IMPL_METHOD ||
       !parent->GetTraceDispatchMethod()) {
     CheckTraceMethod(parent, method, trace_type);
   }
@@ -549,12 +548,6 @@ void BlinkGCPluginConsumer::CheckTraceMethod(
   CheckTraceVisitor visitor(trace, parent, &cache_);
   visitor.TraverseCXXMethodDecl(trace);
 
-  // Skip reporting if this trace method is a just delegate to
-  // traceImpl (or traceAfterDispatchImpl) method. We will report on
-  // CheckTraceMethod on traceImpl method.
-  if (visitor.delegates_to_traceimpl())
-    return;
-
   for (auto& base : parent->GetBases())
     if (!base.second.IsProperlyTraced())
       reporter_.BaseRequiresTracing(parent, trace, base.first);