Implement sampling profiler (chromium side change)

content/browser/media/webrtc_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
 #include "base/debug/trace_event_impl.h"
 #include "base/json/json_reader.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
@@ skipping 402 matching lines @@
   GURL url(embedded_test_server()->GetURL("/media/getusermedia.html"));
   NavigateToURL(shell(), url);
   // Put getUserMedia to work and let it run for a couple of seconds.
   ASSERT_TRUE(ExecuteJavascript(base::StringPrintf(
       "%s({video: true}, 10);", kGetUserMediaAndWaitAndStop)));
 
   // Make sure the stream is up and running, then start collecting traces.
   ExpectTitle("Running...");
   base::debug::TraceLog* trace_log = base::debug::TraceLog::GetInstance();
   trace_log->SetEnabled(base::debug::CategoryFilter("video"),
+                        base::debug::TraceLog::RECORDING_MODE,
                         base::debug::TraceLog::ENABLE_SAMPLING);
   // Check that we are indeed recording.
   ASSERT_EQ(trace_log->GetNumTracesRecorded(), 1);
 
   // Wait until the page title changes to "OK". Do not sleep() here since that
   // would stop both this code and the browser underneath.
   ExpectTitle("OK");
 
   // Note that we need to stop the trace recording before flushing the data.
   trace_log->SetDisabled();
@@ skipping 350 matching lines @@
   EXPECT_TRUE(base::PathExists(dump_file));
   int64 file_size = 0;
   EXPECT_TRUE(base::GetFileSize(dump_file, &file_size));
   EXPECT_EQ(0, file_size);
 
   base::DeleteFile(dump_file, false);
 }
 
 
 }  // namespace content