Detailed heap snapshot usability improvement.

include/v8-profiler.h

Index: include/v8-profiler.h
diff --git a/include/v8-profiler.h b/include/v8-profiler.h
index 27b3c6def3f5431d95e524f8a6cfbccc91f4524b..cac98e8ab48f9d4f474acf4a032387500e5cea5c 100644
--- a/include/v8-profiler.h
+++ b/include/v8-profiler.h
@@ -476,12 +476,18 @@ class V8EXPORT RetainedObjectInfo {  // NOLINT
   virtual intptr_t GetHash() = 0;
 
   /**
-   * Returns human-readable label. It must be a NUL-terminated UTF-8
+   * Returns human-readable label. It must be a NULL-terminated UTF-8

[mnaganov (inactive), 2012/01/27 09:53:17]

Let's change it to "null-terminated" then:
http://en.wikipedia.org/wiki/Null-terminated_string

    * encoded string. V8 copies its contents during a call to GetLabel.
    */
   virtual const char* GetLabel() = 0;
 
   /**
+   * Returns human-readable group label. It must be a NULL-terminated UTF-8
+   * encoded string. V8 copies its contents during a call to GetGroupLabel.

[mnaganov (inactive), 2012/01/27 09:53:17]

Please elaborate more on this -- what's the difference between a regular label
and a group label. Can either of them be NULL?

+   */
+  virtual const char* GetGroupLabel() { return GetLabel(); }
+
+  /**
    * Returns element count in case if a global handle retains
    * a subgraph by holding one of its nodes.
    */