GC plugin: enable plugin on anonymous namespaces.

tools/clang/blink_gc_plugin/BlinkGCPlugin.cpp

 // 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 clang plugin checks various invariants of the Blink garbage
 // collection infrastructure.
 //
 // Errors are described at:
 // http://www.chromium.org/developers/blink-gc-plugin-errors
 
@@ skipping 997 matching lines @@
  public:
   BlinkGCPluginConsumer(CompilerInstance& instance,
                         const BlinkGCPluginOptions& options)
       : instance_(instance),
         diagnostic_(instance.getDiagnostics()),
         options_(options),
         json_(0) {
 
     // Only check structures in the blink and WebKit namespaces.
     options_.checked_namespaces.insert("blink");
-    options_.checked_namespaces.insert("WebKit");
 
     // Ignore GC implementation files.
     options_.ignored_directories.push_back("/heap/");
 
     // Register warning/error messages.
     diag_class_must_left_mostly_derive_gc_ = diagnostic_.getCustomDiagID(
         getErrorLevel(), kClassMustLeftMostlyDeriveGC);
     diag_class_requires_trace_method_ =
         diagnostic_.getCustomDiagID(getErrorLevel(), kClassRequiresTraceMethod);
     diag_base_requires_tracing_ =
@@ skipping 716 matching lines @@
     return false;
   }
 
   bool InCheckedNamespace(RecordInfo* info) {
     if (!info)
       return false;
     for (DeclContext* context = info->record()->getDeclContext();
          !context->isTranslationUnit();
          context = context->getParent()) {
       if (NamespaceDecl* decl = dyn_cast<NamespaceDecl>(context)) {
+        if (decl->isAnonymousNamespace())
+          return true;
         if (options_.checked_namespaces.find(decl->getNameAsString()) !=
             options_.checked_namespaces.end()) {
           return true;
         }
       }
     }
     return false;
   }
 
   bool GetFilename(SourceLocation loc, string* filename) {
@@ skipping 429 matching lines @@
 
  private:
   BlinkGCPluginOptions options_;
 };
 
 }  // namespace
 
 static FrontendPluginRegistry::Add<BlinkGCPluginAction> X(
     "blink-gc-plugin",
     "Check Blink GC invariants");