Fix potential deadlock in webrtc/system_wrappers/source/logging_unittest.cc.

crit_ should not be held while calling Trace.

BUG=3003
R=henrike@webrtc.org, pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/17859005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6616 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/system_wrappers/source/logging_unittest.cc b/webrtc/system_wrappers/source/logging_unittest.cc
index 19f1394..d1eab32 100644
--- a/webrtc/system_wrappers/source/logging_unittest.cc
+++ b/webrtc/system_wrappers/source/logging_unittest.cc
@@ -51,17 +51,16 @@
   }
 
   void TearDown() {
-    CriticalSectionScoped cs(crit_.get());
     Trace::SetTraceCallback(NULL);
     Trace::ReturnTrace();
+    CriticalSectionScoped cs(crit_.get());
     ASSERT_EQ(kTraceNone, level_) << "Print() was not called";
   }
 
   scoped_ptr<CriticalSectionWrapper> crit_;
   scoped_ptr<ConditionVariableWrapper> cv_;
-  TraceLevel level_;
-  int length_;
-  std::ostringstream expected_log_;
+  TraceLevel level_ GUARDED_BY(crit_);
+  std::ostringstream expected_log_ GUARDED_BY(crit_);
 };
 
 TEST_F(LoggingTest, LogStream) {