Revert of GC plugin: improve error reporting when tracing illegal fields.

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.
 
 // TODO: Restructure the name determination to use fully qualified names (ala,
 // blink::Foo) so that the plugin can be enabled for all of chromium. Doing so
 // would allow us to catch errors with structures outside of blink that might
 // have unsafe pointers to GC allocated blink structures.
@@ skipping 31 matching lines @@
   static bool IsWeakMember(const std::string& name) {
     return name == "WeakMember";
   }
 
   static bool IsMemberHandle(const std::string& name) {
     return IsMember(name) ||
            IsWeakMember(name);
   }
 
   static bool IsPersistent(const std::string& name) {
-    return name == "Persistent" ||
-           name == "WeakPersistent" ;
+    return name == "Persistent";
   }
 
-  static bool IsCrossThreadPersistent(const std::string& name) {
-    return name == "CrossThreadPersistent" ||
-           name == "CrossThreadWeakPersistent" ;
+  static bool IsPersistentHandle(const std::string& name) {
+    return IsPersistent(name) ||
+           IsPersistentGCCollection(name);
   }
 
   static bool IsRefPtr(const std::string& name) {
     return name == "RefPtr";
   }
 
   static bool IsOwnPtr(const std::string& name) {
     return name == "OwnPtr";
   }
 
-  static bool IsUniquePtr(const std::string& name) {
-    return name == "unique_ptr";
-  }
-
   static bool IsWTFCollection(const std::string& name) {
     return name == "Vector" ||
            name == "Deque" ||
            name == "HashSet" ||
            name == "ListHashSet" ||
            name == "LinkedHashSet" ||
            name == "HashCountedSet" ||
            name == "HashMap";
   }
 
@@ skipping 167 matching lines @@
     if (suffix.size() > str.size())
       return false;
     return str.compare(str.size() - suffix.size(), suffix.size(), suffix) == 0;
   }
 
   // Test if a template specialization is an instantiation.
   static bool IsTemplateInstantiation(clang::CXXRecordDecl* record);
 };
 
 #endif  // TOOLS_BLINK_GC_PLUGIN_CONFIG_H_