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

chrome/browser/net/chrome_net_log.h

Index: chrome/browser/net/chrome_net_log.h
===================================================================
--- chrome/browser/net/chrome_net_log.h	(revision 175996)
+++ chrome/browser/net/chrome_net_log.h	(working copy)
@@ -13,6 +13,7 @@
 
 class LoadTimingObserver;
 class NetLogLogger;
+class NetLogTempFile;
 
 // ChromeNetLog is an implementation of NetLog that dispatches network log
 // messages to a list of observers.
@@ -38,6 +39,10 @@
     return load_timing_observer_.get();
   }
 
+  NetLogTempFile* net_log_temp_file() {
+    return net_log_temp_file_.get();
+  }
+
  private:
   // NetLog implementation:
   virtual void OnAddEntry(const net::NetLog::Entry& entry) OVERRIDE;
@@ -61,6 +66,7 @@
 
   scoped_ptr<LoadTimingObserver> load_timing_observer_;
   scoped_ptr<NetLogLogger> net_log_logger_;
+  scoped_ptr<NetLogTempFile> net_log_temp_file_;
 
   // |lock_| must be acquired whenever reading or writing to this.
   ObserverList<ThreadSafeObserver, true> observers_;