Provide a way for iterating through all external strings referenced from the JS heap

include/v8-profiler.h

Index: include/v8-profiler.h
===================================================================
--- include/v8-profiler.h	(revision 10391)
+++ include/v8-profiler.h	(working copy)
@@ -434,6 +434,22 @@
    * handle.
    */
   static const uint16_t kPersistentHandleNoClassId = 0;
+
+
+  /**
+   * Interface for iterating though all external resource in the heap.
+   */
+  class ExternalResourceVisitor {

[mnaganov (inactive), 2012/01/11 18:50:23]

You need to put V8EXPORT before the class name.

[yurys, 2012/01/11 19:50:13]

Done.

+   public:
+    virtual void VisitExternalString(Handle<String> string) {}
+    virtual ~ExternalResourceVisitor() {}

[mnaganov (inactive), 2012/01/11 18:50:23]

Destructor must be the first.

[yurys, 2012/01/11 19:50:13]

Done.

+  };
+
+  /**
+   * Iterates through all external resources referenced from current isolate
+   * heap.
+   */
+  static void VisitExternalResources(ExternalResourceVisitor* visitor);

[mnaganov (inactive), 2012/01/11 18:50:23]

I'm not sure HeapProfiler class is a good place for this method -- it doesn't
relate to HeapSnapshots at all, as it iterates live heap. Why not to add it into
the V8 interface class?

[yurys, 2012/01/11 19:50:13]

Since it is used to analyze heap I decided to put it into the heap profiler. I
don't mind moving it into V8 class if you feel it should rather go there.

 };