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

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 485 matching lines @@
     }
 
     if (!Parent() || !edge->value()->IsGCAllocated())
       return;
 
     // In transition mode, disallow  OwnPtr<T>, RawPtr<T> to GC allocated T's,
     // also disallow T* in stack-allocated types.
     if (options_.enable_oilpan) {
       if (Parent()->IsOwnPtr() ||
           Parent()->IsRawPtrClass() ||
-          (stack_allocated_host_ && Parent()->IsRawPtr() &&
-           // TODO: Remove this exception once the node hierarchy is moved.
-           !edge->value()->IsTreeShared())) {
+          (stack_allocated_host_ && Parent()->IsRawPtr())) {
         invalid_fields_.push_back(std::make_pair(current_, Parent()));
         return;
       }
 
       return;
     }
 
     if (Parent()->IsRawPtr() || Parent()->IsRefPtr() || Parent()->IsOwnPtr()) {
       invalid_fields_.push_back(std::make_pair(current_, Parent()));
       return;
@@ skipping 200 matching lines @@
     }
 
     if (info->IsGCDerived()) {
       CheckLeftMostDerived(info);
 
       CheckDispatch(info);
 
       if (CXXMethodDecl* newop = info->DeclaresNewOperator())
         ReportClassOverridesNew(info, newop);
 
-      // TODO: Remove this exception once TreeShared is properly traced.
-      if (!info->IsTreeShared()) {
+      {
         CheckGCRootsVisitor visitor;
         if (visitor.ContainsGCRoots(info))
           ReportClassContainsGCRoots(info, &visitor.gc_roots());
       }
 
       if (info->NeedsFinalization())
         CheckFinalization(info);
     }
 
     DumpClass(info);
@@ skipping 691 matching lines @@
 
  private:
   BlinkGCPluginOptions options_;
 };
 
 }  // namespace
 
 static FrontendPluginRegistry::Add<BlinkGCPluginAction> X(
     "blink-gc-plugin",
     "Check Blink GC invariants");