[wrapper-tracing] Add heap snapshot generator infrastructure

third_party/WebKit/Source/bindings/core/v8/V8GCController.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef V8GCController_h
 #define V8GCController_h
 
 #include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Allocator.h"
+#include <v8-profiler.h>
 #include <v8.h>
 
 namespace blink {
 
 class ExecutionContext;
 class Node;
 
 class CORE_EXPORT V8GCController {
   STATIC_ONLY(V8GCController);
 
  public:
   static void gcPrologue(v8::Isolate*, v8::GCType, v8::GCCallbackFlags);
   static void gcEpilogue(v8::Isolate*, v8::GCType, v8::GCCallbackFlags);
 
   static void collectGarbage(v8::Isolate*, bool onlyMinorGC = false);
   // You should use collectAllGarbageForTesting() when you want to collect all
   // V8 & Blink objects. It runs multiple V8 GCs to collect references
   // that cross the binding boundary. collectAllGarbage() also runs multipe
   // Oilpan GCs to collect a chain of persistent handles.
   static void collectAllGarbageForTesting(v8::Isolate*);
 
   static Node* opaqueRootForGC(v8::Isolate*, Node*);
 
   static void traceDOMWrappers(v8::Isolate*, Visitor*);
   static bool hasPendingActivity(v8::Isolate*, ExecutionContext*);
+
+  static v8::HeapProfiler::RetainerInfos getRetainerInfos(v8::Isolate*);
 };
 
 }  // namespace blink
 
 #endif  // V8GCController_h