Use TracingController for startup tracing

content/browser/tracing/trace_controller_impl.h

 // Copyright (c) 2012 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_TRACE_CONTROLLER_IMPL_H_
 #define CONTENT_BROWSER_TRACING_TRACE_CONTROLLER_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/debug/trace_event.h"
 #include "base/lazy_instance.h"
 #include "content/public/browser/trace_controller.h"
 
 class CommandLine;
 
 namespace content {
 class TraceMessageFilter;
 
 class TraceControllerImpl : public TraceController {
  public:
   static TraceControllerImpl* GetInstance();
 
-  // Called on the main thread of the browser process to initialize
-  // startup tracing.
-  void InitStartupTracing(const CommandLine& command_line);
-  bool is_tracing_startup() const { return is_tracing_startup_; }
-
   // TraceController implementation:
   virtual bool BeginTracing(TraceSubscriber* subscriber,
                             const std::string& category_patterns,
                             base::debug::TraceLog::Options options) OVERRIDE;
   virtual  bool EndTracingAsync(TraceSubscriber* subscriber) OVERRIDE;
   virtual bool GetTraceBufferPercentFullAsync(
       TraceSubscriber* subscriber) OVERRIDE;
   virtual bool SetWatchEvent(TraceSubscriber* subscriber,
                              const std::string& category_name,
                              const std::string& event_name) OVERRIDE;
@@ skipping 48 matching lines @@
       bool has_more_events);
 
   FilterMap filters_;
   TraceSubscriber* subscriber_;
   // Pending acks for EndTracingAsync:
   int pending_end_ack_count_;
   // Pending acks for GetTraceBufferPercentFullAsync:
   int pending_bpf_ack_count_;
   float maximum_bpf_;
   bool is_tracing_;
-  bool is_tracing_startup_;
   bool is_get_category_groups_;
   std::set<std::string> known_category_groups_;
   std::string watch_category_;
   std::string watch_name_;
   base::debug::TraceLog::Options trace_options_;
   base::debug::CategoryFilter category_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceControllerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_TRACING_TRACE_CONTROLLER_IMPL_H_