text: // Copyright 2013 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 "chrome/browser/ui/webui/chromeos/slow_trace_ui.h"
  
  #include "base/bind.h"
  #include "base/memory/ref_counted_memory.h"
  #include "base/message_loop/message_loop.h"
  #include "base/strings/string_number_conversions.h"
  #include "chrome/browser/profiles/profile.h"
  #include "chrome/common/url_constants.h"
  #include "components/feedback/tracing_manager.h"
  #include "content/public/browser/url_data_source.h"
  #include "content/public/browser/web_ui.h"
  
  namespace chromeos {
  
  ////////////////////////////////////////////////////////////////////////////////
  //
  // SlowTraceSource
  //
  ////////////////////////////////////////////////////////////////////////////////
  
  SlowTraceSource::SlowTraceSource() {
  }
  
  std::string SlowTraceSource::GetSource() const {
    return chrome::kChromeUISlowTraceHost;
  }
  
  void SlowTraceSource::StartDataRequest(
      const std::string& path,
      int render_process_id,
      int render_frame_id,
      const content::URLDataSource::GotDataCallback& callback) {
    int trace_id = 0;
    size_t pos = path.find('#');
    TracingManager* manager = TracingManager::Get();
    if (!manager ||
        pos == std::string::npos ||
        !base::StringToInt(path.substr(pos + 1), &trace_id)) {
      callback.Run(NULL);
      return;
    }
    manager->GetTraceData(trace_id,
                          base::Bind(&SlowTraceSource::OnGetTraceData,
                                     base::Unretained(this),
                                     callback));
  }
  
  std::string SlowTraceSource::GetMimeType(const std::string& path) const {
    return "application/zip";
  }
  
  SlowTraceSource::~SlowTraceSource() {}
  
  void SlowTraceSource::OnGetTraceData(
      const content::URLDataSource::GotDataCallback& callback,
      scoped_refptr<base::RefCountedString> trace_data) {
    callback.Run(trace_data);
  }
  
  ////////////////////////////////////////////////////////////////////////////////
  //
  // SlowTraceController
  //
  ////////////////////////////////////////////////////////////////////////////////
  
  SlowTraceController::SlowTraceController(content::WebUI* web_ui)
      : WebUIController(web_ui) {
    SlowTraceSource* html_source = new SlowTraceSource();
  
    // Set up the chrome://slow_trace/ source.
    Profile* profile = Profile::FromWebUI(web_ui);
    content::URLDataSource::Add(profile, html_source);
  }
  
  } // namespace chromeos
  