Added Net logging to FileStream.

net/base/file_stream.h

Index: net/base/file_stream.h
diff --git a/net/base/file_stream.h b/net/base/file_stream.h
index f2a8f7f4f94701027ed5a2a08b822dec83491922..46ad32688606a506ccc06fca1cfeb310654a8444 100644
--- a/net/base/file_stream.h
+++ b/net/base/file_stream.h
@@ -15,6 +15,7 @@
 #include "base/platform_file.h"
 #include "net/base/completion_callback.h"
 #include "net/base/net_export.h"
+#include "net/base/net_log.h"
 
 class FilePath;
 
@@ -32,6 +33,9 @@ class NET_EXPORT FileStream {
  public:
   FileStream();
 
+  // Create a |FileStream| with a new |BoundNetLog| (based on |log|) attached.
+  FileStream(net::NetLog* log);
+
   // Construct a FileStream with an existing file handle and opening flags.
   // |file| is valid file handle.
   // |flags| is a bitfield of base::PlatformFileFlags when the file handle was
@@ -136,6 +140,11 @@ class NET_EXPORT FileStream {
   // Turns on UMA error statistics gathering.
   void EnableErrorStatistics();
 
+  // Sets the source reference for net-internals logging.
+  // Creates source dependency events between |log| and |bound_net_log_|.
+  // If |bound_net_log_| is not valid, nothing happens.
+  void SetBoundNetLogSource(const net::BoundNetLog& log);
+
  private:
   class AsyncContext;
   friend class AsyncContext;
@@ -149,6 +158,7 @@ class NET_EXPORT FileStream {
   int open_flags_;
   bool auto_closed_;
   bool record_uma_;
+  net::BoundNetLog bound_net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(FileStream);
 };