First cut at UI for saving net_logs data into a temporary file on

chrome/browser/net/net_log_logger.h

Index: chrome/browser/net/net_log_logger.h
===================================================================
--- chrome/browser/net/net_log_logger.h	(revision 175049)
+++ chrome/browser/net/net_log_logger.h	(working copy)
@@ -32,12 +32,19 @@
   // Separate from constructor to enforce thread safety.
   void StartObserving(net::NetLog* net_log);
 
+  // Stops observing |net_log_|.  Must already be watching |net_log_|.
+  void StopObserving();
+
   // net::NetLog::ThreadSafeObserver implementation:
   virtual void OnAddEntry(const net::NetLog::Entry& entry) OVERRIDE;
 
  private:
   ScopedStdioHandle file_;
 
+  // NetLog that is being observed. Weak ptr, owned by the caller of
+  // |StartObserving|. |StopObserving| stops observing of |net_log_|.
+  net::NetLog* net_log_;

[mmenke, 2013/01/04 16:22:09]

This isn't needed.  NetLog::ThreadSafeObserver has a net_log() function that
returns the same thing.

+
   DISALLOW_COPY_AND_ASSIGN(NetLogLogger);
 };