Get a filename of dumped heap profile in a V8 extension HeapProfilerDump().

third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h

Index: third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h
diff --git a/third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h b/third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h
index 8e3ee962c7126c9f582c022033b95cd71953902e..2bb0a311e5655ba5147cc476c3422dbdd61e924b 100644
--- a/third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h
+++ b/third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h
@@ -90,6 +90,14 @@ PERFTOOLS_DLL_DECL void HeapProfilerStop();
  */
 PERFTOOLS_DLL_DECL void HeapProfilerDump(const char *reason);
 
+/* Dump a profile now and store the filename where the profile is dumped to
+ * in addition to HeapProfilerDump().
+ */
+PERFTOOLS_DLL_DECL void HeapProfilerDumpWithFileName(
+    const char *reason,
+    char* dumped_filename_buffer,
+    int filename_buffer_length);

[Dai Mikurube (NOT FULLTIME), 2013/02/13 16:04:46]

FYI, |dumped_filename_buffer| is output of this function.  Reviewers may think
that it should be the last argument, but it follows the existing convention of
tcmalloc.  See the line 195 in heap-profile-table for example:
http://src.chromium.org/viewvc/chrome/trunk/src/third_party/tcmalloc/chromium...

We may want more comments on the arguments.  I'll add it later.

+
 /* Generate current heap profiling information.
  * Returns an empty string when heap profiling is not active.
  * The returned pointer is a '\0'-terminated string allocated using malloc()