More aggressive IO asserts in content_browsertests.

content/browser/media/webrtc/webrtc_getusermedia_browsertest.cc

 // Copyright 2014 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 <stddef.h>
 
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/stringprintf.h"
 #include "base/test/trace_event_analyzer.h"
+#include "base/threading/thread_restrictions.h"
 #include "base/trace_event/trace_event_impl.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "content/browser/media/webrtc/webrtc_internals.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/public/test/test_utils.h"
 #include "content/shell/browser/shell.h"
@@ skipping 73 matching lines @@
     trace_config.EnableSampling();
     trace_log_->SetEnabled(trace_config,
                            base::trace_event::TraceLog::RECORDING_MODE);
     // Check that we are indeed recording.
     EXPECT_EQ(trace_log_->GetNumTracesRecorded(), 1);
   }
 
   void StopTracing() {
     CHECK(message_loop_runner_.get() == NULL)
         << "Calling StopTracing more than once";
-    trace_log_->SetDisabled();
+
+    {
+      base::ThreadRestrictions::ScopedAllowIO allow_thread_join_caused_by_test;
+      trace_log_->SetDisabled();
+    }
+
     message_loop_runner_ = new MessageLoopRunner;
     trace_log_->Flush(base::Bind(
         &WebRtcGetUserMediaBrowserTest::OnTraceDataCollected,
         base::Unretained(this)));
     message_loop_runner_->Run();
   }
 
   void OnTraceDataCollected(
       const scoped_refptr<base::RefCountedString>& events_str_ptr,
       bool has_more_events) {
@@ skipping 654 matching lines @@
     {640, 640, 360, 360, 10, 30},
     {640, 640, 480, 480, 10, 30},
     {960, 960, 720, 720, 10, 30},
     {1280, 1280, 720, 720, 10, 30}};
 
 INSTANTIATE_TEST_CASE_P(UserMedia,
                         WebRtcConstraintsBrowserTest,
                         testing::ValuesIn(kAllUserMediaSizes));
 
 }  // namespace content