clang-plugin: Enable RecursiveASTVisitor approach by default.

tools/clang/plugins/ChromeClassTester.cpp

 // Copyright (c) 2012 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.
 
 // A general interface for filtering and only acting on classes in Chromium C++
 // code.
 
 #include "ChromeClassTester.h"
 
 #include <algorithm>
@@ skipping 23 matching lines @@
 ChromeClassTester::ChromeClassTester(CompilerInstance& instance,
                                      const Options& options)
     : options_(options),
       instance_(instance),
       diagnostic_(instance.getDiagnostics()) {
   BuildBannedLists();
 }
 
 ChromeClassTester::~ChromeClassTester() {}
 
-void ChromeClassTester::HandleTagDeclDefinition(TagDecl* tag) {
-  pending_class_decls_.push_back(tag);
-}
-
-bool ChromeClassTester::HandleTopLevelDecl(DeclGroupRef group_ref) {
-  for (size_t i = 0; i < pending_class_decls_.size(); ++i)
-    CheckTag(pending_class_decls_[i]);
-  pending_class_decls_.clear();
-
-  return true;  // true means continue parsing.
-}
-
 void ChromeClassTester::CheckTag(TagDecl* tag) {
   // We handle class types here where we have semantic information. We can only
   // check structs/classes/enums here, but we get a bunch of nice semantic
   // information instead of just parsing information.
 
   if (CXXRecordDecl* record = dyn_cast<CXXRecordDecl>(tag)) {
     if (InBannedNamespace(record))
       return;
 
     SourceLocation record_location = record->getInnerLocStart();
@@ skipping 266 matching lines @@
   }
 
   *filename = ploc.getFilename();
   return true;
 }
 
 DiagnosticsEngine::Level ChromeClassTester::getErrorLevel() {
   return diagnostic().getWarningsAsErrors() ? DiagnosticsEngine::Error
                                             : DiagnosticsEngine::Warning;
 }