blink_gc_plugin: retire overloaded traceImpl detection and handling.

tools/clang/blink_gc_plugin/tests/legacy_naming/trace_after_dispatch_impl.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef TRACE_AFTER_DISPATCH_IMPL_H_
 #define TRACE_AFTER_DISPATCH_IMPL_H_
 
 #include "heap/stubs.h"
 
 namespace blink {
 
 class X : public GarbageCollected<X> {
  public:
   void trace(Visitor*) {}
 };
 
 enum ClassTag {
   BASE, DERIVED
 };
 
 class TraceAfterDispatchInlinedBase
     : public GarbageCollected<TraceAfterDispatchInlinedBase> {
  public:
   explicit TraceAfterDispatchInlinedBase(ClassTag tag) : tag_(tag) {}
 
-  void trace(Visitor* visitor) { traceImpl(visitor); }
-  void trace(InlinedGlobalMarkingVisitor visitor) { traceImpl(visitor); }
-
-  void traceAfterDispatch(Visitor* visitor) { traceAfterDispatchImpl(visitor); }
-  void traceAfterDispatch(InlinedGlobalMarkingVisitor visitor) {
-    traceAfterDispatchImpl(visitor);
-  }
+  void trace(Visitor*);
+  void traceAfterDispatch(Visitor* visitor) { visitor->trace(x_base_); }
 
  private:
-  template <typename VisitorDispatcher>
-  void traceImpl(VisitorDispatcher visitor);
-
-  template <typename VisitorDispatcher>
-  void traceAfterDispatchImpl(VisitorDispatcher visitor) {
-    visitor->trace(x_base_);
-  }
-
   ClassTag tag_;
   Member<X> x_base_;
 };
 
 class TraceAfterDispatchInlinedDerived : public TraceAfterDispatchInlinedBase {
  public:
   TraceAfterDispatchInlinedDerived() : TraceAfterDispatchInlinedBase(DERIVED) {}
 
-  void traceAfterDispatch(Visitor* visitor) { traceAfterDispatchImpl(visitor); }
-  void traceAfterDispatch(InlinedGlobalMarkingVisitor visitor) {
-    traceAfterDispatchImpl(visitor);
-  }
-
- private:
-  template <typename VisitorDispatcher>
-  void traceAfterDispatchImpl(VisitorDispatcher visitor) {
+  void traceAfterDispatch(Visitor* visitor) {
     visitor->trace(x_derived_);
     TraceAfterDispatchInlinedBase::traceAfterDispatch(visitor);
   }
 
+ private:
   Member<X> x_derived_;
 };
 
 class TraceAfterDispatchExternBase
     : public GarbageCollected<TraceAfterDispatchExternBase> {
  public:
   explicit TraceAfterDispatchExternBase(ClassTag tag) : tag_(tag) {}
 
   void trace(Visitor* visitor);
-  void trace(InlinedGlobalMarkingVisitor visitor);
-
   void traceAfterDispatch(Visitor* visitor);
-  void traceAfterDispatch(InlinedGlobalMarkingVisitor visitor);
 
  private:
-  template <typename VisitorDispatcher>
-  void traceImpl(VisitorDispatcher visitor);
-
-  template <typename VisitorDispatcher>
-  void traceAfterDispatchImpl(VisitorDispatcher visitor);
-
   ClassTag tag_;
   Member<X> x_base_;
 };
 
 class TraceAfterDispatchExternDerived : public TraceAfterDispatchExternBase {
  public:
   TraceAfterDispatchExternDerived() : TraceAfterDispatchExternBase(DERIVED) {}
 
   void traceAfterDispatch(Visitor* visitor);
-  void traceAfterDispatch(InlinedGlobalMarkingVisitor visitor);
 
  private:
-  template <typename VisitorDispatcher>
-  void traceAfterDispatchImpl(VisitorDispatcher visitor);
-
   Member<X> x_derived_;
 };
 
 }
 
 #endif  // TRACE_AFTER_DISPATCH_IMPL_H_