Made the NavigationTracingObserver always be active whenever background tracing is active

content/browser/tracing/background_tracing_manager_impl.cc

 // Copyright 2015 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 "content/browser/tracing/background_tracing_manager_impl.h"
 
 #include "base/command_line.h"
 #include "base/cpu.h"
 #include "base/json/json_writer.h"
 #include "base/macros.h"
@@ skipping 187 matching lines @@
                                       config_->disable_blink_features());
     }
   }
 
   EnableRecordingIfConfigNeedsIt();
 
   RecordBackgroundTracingMetric(SCENARIO_ACTIVATED_SUCCESSFULLY);
   return true;
 }
 
-bool BackgroundTracingManagerImpl::HasActiveScenarioForTesting() {
+bool BackgroundTracingManagerImpl::HasActiveScenario() {
   return config_;
 }
 
 bool BackgroundTracingManagerImpl::IsTracingForTesting() {
   return is_tracing_;
 }
 
 void BackgroundTracingManagerImpl::ValidateStartupScenario() {
   if (!config_ || !delegate_)
     return;
@@ skipping 373 matching lines @@
              "disabled-by-default-toplevel.flow,"
              "disabled-by-default-ipc.flow";
     case BackgroundTracingConfigImpl::CategoryPreset::BLINK_STYLE:
       return "blink_style";
   }
   NOTREACHED();
   return "";
 }
 
 }  // namspace content