Roll Chrome into Mojo.

net/url_request/url_request_file_dir_job.cc

Index: net/url_request/url_request_file_dir_job.cc
diff --git a/net/url_request/url_request_file_dir_job.cc b/net/url_request/url_request_file_dir_job.cc
index da586f3561b9508cae2bd0e58aa98dbafc66815b..d999c4f0a0019272e45f3e18e59a0d2086826a5e 100644
--- a/net/url_request/url_request_file_dir_job.cc
+++ b/net/url_request/url_request_file_dir_job.cc
@@ -7,6 +7,7 @@
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop/message_loop.h"
+#include "base/profiler/scoped_tracker.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
@@ -67,6 +68,11 @@ void URLRequestFileDirJob::Kill() {
 
 bool URLRequestFileDirJob::ReadRawData(IOBuffer* buf, int buf_size,
                                        int* bytes_read) {
+  // TODO(vadimt): Remove ScopedTracker below once crbug.com/423948 is fixed.
+  tracked_objects::ScopedTracker tracking_profile(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "423948 URLRequestFileDirJob::ReadRawData"));
+
   DCHECK(bytes_read);
   *bytes_read = 0;