New heap profiler: add support for progress reporting and control.

include/v8-profiler.h

Index: include/v8-profiler.h
diff --git a/include/v8-profiler.h b/include/v8-profiler.h
index 08f47ca36e6346614b8206c80a8cf718f310215b..675a229854ef086f617fae15823f2af8a6da4725 100644
--- a/include/v8-profiler.h
+++ b/include/v8-profiler.h
@@ -245,7 +245,6 @@ class V8EXPORT HeapGraphPath {
 class V8EXPORT HeapGraphNode {
  public:
   enum Type {
-    kInternal = 0,   // For compatibility, will be removed.
     kHidden = 0,     // Hidden node, may be filtered when shown to user.
     kArray = 1,      // An array of elements.
     kString = 2,     // A string.
@@ -413,7 +412,8 @@ class V8EXPORT HeapProfiler {
    */
   static const HeapSnapshot* TakeSnapshot(
       Handle<String> title,
-      HeapSnapshot::Type type = HeapSnapshot::kFull);
+      HeapSnapshot::Type type = HeapSnapshot::kFull,
+      ActivityControl* control = NULL);
 };