blink_gc_plugin: retire overloaded traceImpl detection and handling.

tools/clang/blink_gc_plugin/Config.cpp

 // 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.
 
 #include "Config.h"
 
 #include <cassert>
 
 #include "clang/AST/AST.h"
 
 using namespace clang;
 
 // Legacy names to be removed after Blink rename:
 namespace legacy {
 const char kCreateName[] = "create";
 const char kTraceName[] = "trace";
-const char kTraceImplName[] = "traceImpl";
 const char kFinalizeName[] = "finalizeGarbageCollectedObject";
 const char kTraceAfterDispatchName[] = "traceAfterDispatch";
-const char kTraceAfterDispatchImplName[] = "traceAfterDispatchImpl";
 const char kRegisterWeakMembersName[] = "registerWeakMembers";
 const char kAdjustAndMarkName[] = "adjustAndMark";
 const char kIsHeapObjectAliveName[] = "isHeapObjectAlive";
 }  // namespace legacy
 
 const char kNewOperatorName[] = "operator new";
 const char* kCreateName = "Create";
 const char* kTraceName = "Trace";
-const char* kTraceImplName = "TraceImpl";
 const char* kFinalizeName = "FinalizeGarbageCollectedObject";
 const char* kTraceAfterDispatchName = "TraceAfterDispatch";
-const char* kTraceAfterDispatchImplName = "TraceAfterDispatchImpl";
 const char* kRegisterWeakMembersName = "RegisterWeakMembers";
 const char kHeapAllocatorName[] = "HeapAllocator";
 const char kTraceIfNeededName[] = "TraceIfNeeded";
 const char kVisitorDispatcherName[] = "VisitorDispatcher";
 const char kVisitorVarName[] = "visitor";
 const char* kAdjustAndMarkName = "AdjustAndMark";
 const char* kIsHeapObjectAliveName = "IsHeapObjectAlive";
 const char kIsEagerlyFinalizedName[] = "IsEagerlyFinalizedMarker";
 const char kConstIteratorName[] = "const_iterator";
 const char kIteratorName[] = "iterator";
 const char kConstReverseIteratorName[] = "const_reverse_iterator";
 const char kReverseIteratorName[] = "reverse_iterator";
 
 void Config::UseLegacyNames() {
   kCreateName = legacy::kCreateName;
   kTraceName = legacy::kTraceName;
-  kTraceImplName = legacy::kTraceImplName;
   kFinalizeName = legacy::kFinalizeName;
   kTraceAfterDispatchName = legacy::kTraceAfterDispatchName;
-  kTraceAfterDispatchImplName = legacy::kTraceAfterDispatchImplName;
   kRegisterWeakMembersName = legacy::kRegisterWeakMembersName;
   kAdjustAndMarkName = legacy::kAdjustAndMarkName;
   kIsHeapObjectAliveName = legacy::kIsHeapObjectAliveName;
 }
 
 bool Config::IsTemplateInstantiation(CXXRecordDecl* record) {
   ClassTemplateSpecializationDecl* spec =
       dyn_cast<clang::ClassTemplateSpecializationDecl>(record);
   if (!spec)
     return false;
   switch (spec->getTemplateSpecializationKind()) {
     case TSK_ImplicitInstantiation:
     case TSK_ExplicitInstantiationDefinition:
       return true;
     case TSK_Undeclared:
     case TSK_ExplicitSpecialization:
       return false;
     // TODO: unsupported cases.
     case TSK_ExplicitInstantiationDeclaration:
       return false;
   }
   assert(false && "Unknown template specialization kind");
   return false;
 }