Introduce a way to grab heap stats.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 33179f5bf0efe00fae3cf0da9502ed2345a17268..c6a4f46c070e76cded24bb3b5a433ab770eb56a2 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -3741,7 +3741,8 @@ class V8EXPORT Locker {
 class V8EXPORT OutputStream {  // NOLINT
  public:
   enum OutputEncoding {
-    kAscii = 0  // 7-bit ASCII.
+    kAscii = 0,  // 7-bit ASCII.
+    kUint32 = 1

[mnaganov (inactive), 2012/04/11 14:35:40]

Any particular reason for not sending this data as ASCII / JSON? This is just a
stream of numbers, AFAICT.

   };
   enum WriteResult {
     kContinue = 0,
@@ -3760,6 +3761,13 @@ class V8EXPORT OutputStream {  // NOLINT
    * will not be called in case writing was aborted.
    */
   virtual WriteResult WriteAsciiChunk(char* data, int size) = 0;
+

[mnaganov (inactive), 2012/04/11 14:35:40]

nit: no blank line

+  /**
+   * Writes the next chunk of snapshot data into the stream. Writing

[mnaganov (inactive), 2012/04/11 14:35:40]

Does it really write snapshot data?

+   * can be stopped by returning kAbort as function result. EndOfStream
+   * will not be called in case writing was aborted.
+   */
+  virtual WriteResult WriteUint32Chunk(uint32_t* data, int size) = 0;
 };