Blink GC plugin: remove temporary exceptions for the TreeShared/Node hierarchy.

tools/clang/blink_gc_plugin/Config.h

 // Copyright 2014 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.
 
 // This file defines the names used by GC infrastructure.
 
 #ifndef TOOLS_BLINK_GC_PLUGIN_CONFIG_H_
 #define TOOLS_BLINK_GC_PLUGIN_CONFIG_H_
 
 #include "clang/AST/AST.h"
@@ skipping 93 matching lines @@
     return name == "GarbageCollectedFinalized" ||
            name == "RefCountedGarbageCollected";
   }
 
   static bool IsGCBase(const std::string& name) {
     return name == "GarbageCollected" ||
            IsGCFinalizedBase(name) ||
            IsGCMixinBase(name);
   }
 
-  static bool IsTreeSharedBase(const std::string& name) {
-    return name == "TreeShared";
-  }
-
   static bool IsAnnotated(clang::Decl* decl, const std::string& anno) {
     clang::AnnotateAttr* attr = decl->getAttr<clang::AnnotateAttr>();
     return attr && (attr->getAnnotation() == anno);
   }
 
   static bool IsStackAnnotated(clang::Decl* decl) {
     return IsAnnotated(decl, "blink_stack_allocated");
   }
 
   static bool IsIgnoreAnnotated(clang::Decl* decl) {
@@ skipping 40 matching lines @@
   }
 
   static bool EndsWith(const std::string& str, const std::string& suffix) {
     if (suffix.size() > str.size())
       return false;
     return str.compare(str.size() - suffix.size(), suffix.size(), suffix) == 0;
   }
 };
 
 #endif  // TOOLS_BLINK_GC_PLUGIN_CONFIG_H_