Slow Reports: Set a minimum time in between reports, and check for OTR sessions

chrome/browser/tracing/chrome_tracing_delegate.h

 // 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.
 
 #ifndef CHROME_BROWSER_TRACING_CHROME_TRACING_DELEGATE_H_
 #define CHROME_BROWSER_TRACING_CHROME_TRACING_DELEGATE_H_
 
+#include "chrome/browser/ui/browser_list_observer.h"
 #include "content/public/browser/tracing_delegate.h"
 
-class ChromeTracingDelegate : public content::TracingDelegate {
+class PrefRegistrySimple;
+
+void RegisterTracingPrefs(PrefRegistrySimple* registry);
+
+class ChromeTracingDelegate : public content::TracingDelegate,
+                              public chrome::BrowserListObserver {
  public:
+  ChromeTracingDelegate();
+  ~ChromeTracingDelegate() override;
+
   scoped_ptr<content::TraceUploader> GetTraceUploader(
       net::URLRequestContextGetter* request_context) override;
+
+  bool IsAllowedToBeginBackgroundScenario(
+      const content::BackgroundTracingConfig& config,
+      bool requires_anonymized_data) override;
+
+  bool IsAllowedToEndBackgroundScenario(
+      const content::BackgroundTracingConfig& config,
+      bool requires_anonymized_data) override;
+
+ private:
+  // chrome::BrowserListObserver implementation.
+  void OnBrowserAdded(Browser* browser) override;
+
+  bool incognito_launched_;
 };
 
 #endif  // CHROME_BROWSER_TRACING_CHROME_TRACING_DELEGATE_H_