Implement Reactive Configuration in Background Tracing

content/browser/tracing/background_tracing_manager_impl.h

Index: content/browser/tracing/background_tracing_manager_impl.h
diff --git a/content/browser/tracing/background_tracing_manager_impl.h b/content/browser/tracing/background_tracing_manager_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..7e7fa7b65427dd0c583fe3793507ebc6743f6ac9
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+++ b/content/browser/tracing/background_tracing_manager_impl.h
@@ -0,0 +1,103 @@
+// 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 CONTENT_BROWSER_TRACING_BACKGROUND_TRACING_MANAGER_IMPL_H_
+#define CONTENT_BROWSER_TRACING_BACKGROUND_TRACING_MANAGER_IMPL_H_
+
+#include "base/lazy_instance.h"
+#include "base/memory/ref_counted_memory.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/timer/timer.h"
+#include "content/browser/tracing/tracing_controller_impl.h"
+#include "content/public/browser/background_tracing_config.h"
+#include "content/public/browser/background_tracing_manager.h"
+
+namespace content {
+
+class BackgroundTracingManagerImpl : public content::BackgroundTracingManager {
+ public:
+  static BackgroundTracingManagerImpl* GetInstance();
+
+  bool SetActiveScenario(scoped_ptr<BackgroundTracingConfig>,
+                         const ReceiveCallback&,
+                         bool) override;
+  void WhenIdle(IdleCallback idle_callback) override;
+
+  void TriggerNamedEvent(TriggerHandle, StartedFinalizingCallback) override;
+  TriggerHandle RegisterTriggerType(const char* trigger_name) override;
+  void GetTriggerNameList(std::vector<std::string>* trigger_names) override;
+
+  void InvalidateTriggerHandlesForTesting() override;
+
+ private:
+  BackgroundTracingManagerImpl();
+  ~BackgroundTracingManagerImpl() override;
+
+  void EnableRecording(base::trace_event::CategoryFilter);
+  void EnableRecordingIfConfigNeedsIt();
+  void OnFinalizeStarted(scoped_refptr<base::RefCountedString>);
+  void OnFinalizeComplete();
+  void OnTracingTimeout();
+  void BeginFinalizing(StartedFinalizingCallback);
+
+  std::string GetTriggerNameFromHandle(TriggerHandle handle) const;
+  bool IsTriggerHandleValid(TriggerHandle handle) const;
+
+  bool IsAbleToTriggerTracing(TriggerHandle handle) const;
+  bool IsSupportedConfig(BackgroundTracingConfig* config);
+
+  base::trace_event::CategoryFilter GetCategoryFilterForCategoryPreset(
+      BackgroundTracingConfig::CategoryPreset) const;
+
+  class TraceDataEndpointWrapper
+      : public content::TracingController::TraceDataEndpoint {
+   public:
+    TraceDataEndpointWrapper(base::Callback<
+        void(scoped_refptr<base::RefCountedString>)> done_callback);
+
+    void ReceiveTraceFinalContents(const std::string& file_contents) override;
+
+   private:
+    ~TraceDataEndpointWrapper() override;
+
+    base::Callback<void(scoped_refptr<base::RefCountedString>)> done_callback_;
+  };
+
+  class TracingTimer {
+   public:
+    TracingTimer(StartedFinalizingCallback);
+
+    void StartTimer();
+    void CancelTimer();
+
+   private:
+    ~TracingTimer();
+
+    void TracingTimerFired();
+
+    base::OneShotTimer<TracingTimer> tracing_timer_;
+    BackgroundTracingManager::StartedFinalizingCallback callback_;
+  };
+
+  scoped_ptr<content::BackgroundTracingConfig> config_;
+  scoped_refptr<TraceDataEndpointWrapper> data_endpoint_wrapper_;
+  std::map<TriggerHandle, std::string> trigger_handles_;
+  ReceiveCallback receive_callback_;
+
+  bool is_gathering_;
+  bool is_tracing_;
+  bool requires_anonymized_data_;
+  int trigger_handle_ids_;
+
+  IdleCallback idle_callback_;
+
+  friend struct base::DefaultLazyInstanceTraits<BackgroundTracingManagerImpl>;
+
+  DISALLOW_COPY_AND_ASSIGN(BackgroundTracingManagerImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_TRACING_BACKGROUND_TRACING_MANAGER_IMPL_H_