Re-land first pass BackgroundTracingManager.

content/browser/tracing/background_tracing_manager_impl.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 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 "content/browser/tracing/tracing_controller_impl.h"
+#include "content/public/browser/background_tracing_manager.h"
+
+namespace content {
+
+class BackgroundTracingManagerImpl : public content::BackgroundTracingManager {
+ public:
+  static BackgroundTracingManagerImpl* GetInstance();
+
+  bool SetActiveScenario(
+      scoped_refptr<content::BackgroundTracingConfig>,
+      scoped_refptr<content::BackgroundTracingUploadSink>) override;
+  void WhenIdle(IdleCallback idle_callback) override;
+
+  void DidTriggerHappen(TriggerHandle, StartedFinalizingCallback) override;
+  TriggerHandle RegisterTriggerType(const char* trigger_name) override;
+  void GetTriggerNameList(std::vector<std::string>& trigger_names) override;
+
+  void InvalidateTriggerHandlesForTesting();
+
+ private:
+  BackgroundTracingManagerImpl();
+  ~BackgroundTracingManagerImpl() override;
+
+  void EnableRecording(base::trace_event::CategoryFilter);
+  void EnableRecordingIfConfigNeedsIt();
+  void OnFinalizeComplete();
+  void BeginFinalizing(StartedFinalizingCallback);
+
+  std::string GetTriggerNameFromHandle(TriggerHandle handle) const;
+  bool IsTriggerHandleValid(TriggerHandle handle) const;
+
+  bool IsAbleToTriggerTracing(TriggerHandle handle) const;
+  bool IsSupportedConfig(scoped_refptr<BackgroundTracingConfig> config);
+
+  base::trace_event::CategoryFilter GetCategoryFilterForCategoryPreset(
+      BackgroundTracingConfig::CategoryPreset) const;
+
+  class TraceDataEndpointWrapper
+      : public content::TracingController::TraceDataEndpoint {
+   public:
+    TraceDataEndpointWrapper(base::Callback<void()> done_callback);
+
+    void ReceiveTraceFinalContents(const std::string& file_contents) override;
+    void SetUploadSink(
+        scoped_refptr<content::BackgroundTracingUploadSink> upload_sink);
+
+   private:
+    ~TraceDataEndpointWrapper() override;
+
+    scoped_refptr<content::BackgroundTracingUploadSink> upload_sink_;
+    base::Callback<void()> done_callback_;
+  };
+
+  scoped_refptr<content::BackgroundTracingConfig> config_;
+  scoped_refptr<TraceDataEndpointWrapper> data_endpoint_wrapper_;
+  std::map<TriggerHandle, std::string> trigger_handles_;
+
+  bool is_gathering_;
+  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_