Move destruction of WebRtcLogUploader to post threads teardown.

chrome/browser/media/webrtc_log_uploader.h

 // 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.
 
 #ifndef CHROME_BROWSER_MEDIA_WEBRTC_LOG_UPLOADER_H_
 #define CHROME_BROWSER_MEDIA_WEBRTC_LOG_UPLOADER_H_
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
-#include "base/memory/ref_counted.h"
-#include "base/platform_file.h"
 #include "base/threading/thread_checker.h"
 #include "chrome/browser/media/webrtc_logging_handler_host.h"
 #include "net/url_request/url_fetcher_delegate.h"
 
 class Profile;
 
 namespace base {
 class SharedMemory;
 }
 
 namespace net {
 class URLFetcher;
-class URLRequestContextGetter;
 }
 
 typedef struct z_stream_s z_stream;
 
 // Used when uploading is done to perform post-upload actions.
 typedef struct {
   base::FilePath upload_list_path;
   WebRtcLoggingHandlerHost::UploadDoneCallback callback;
   scoped_refptr<WebRtcLoggingHandlerHost> host;
 } WebRtcLogUploadDoneData;
 
-class WebRtcLogURLRequestContextGetter;
-
 // WebRtcLogUploader uploads WebRTC logs, keeps count of how many logs have
 // been started and denies further logs if a limit is reached. It also adds
 // the timestamp and report ID of the uploded log to a text file. There must
 // only be one object of this type.
 class WebRtcLogUploader : public net::URLFetcherDelegate {
  public:
   WebRtcLogUploader();
   virtual ~WebRtcLogUploader();
 
   // net::URLFetcherDelegate implementation.
@@ skipping 11 matching lines @@
   // After this function has been called, a new permission must be granted.
   // Call either this function or LoggingStoppedDoUpload().
   void LoggingStoppedDontUpload();
 
   // Notifies that that logging has stopped and that the log should be uploaded.
   // Decreases log count. May only be called if permission to log has been
   // granted by calling ApplyForStartLogging() and getting true in return. After
   // this function has been called, a new permission must be granted. Call
   // either this function or LoggingStoppedDontUpload().
   void LoggingStoppedDoUpload(
-      net::URLRequestContextGetter* request_context,
       scoped_ptr<unsigned char[]> log_buffer,
       uint32 length,
       const std::map<std::string, std::string>& meta_data,
       const WebRtcLogUploadDoneData& upload_done_data);
 
+  // Cancels URL fetcher operation by resetting |url_fetcher_|. This cancels any
+  // pending uploads and releases SystemURLRequestContextGetter references.
+  void CancelURLFetcherOperations();
+
   // For testing purposes. If called, the multipart will not be uploaded, but
   // written to |post_data_| instead.
   void OverrideUploadWithBufferForTesting(std::string* post_data) {
     post_data_ = post_data;
   }
 
  private:
   FRIEND_TEST_ALL_PREFIXES(WebRtcLogUploaderTest,
                            AddUploadedLogInfoToUploadListFile);
 
   // Sets up a multipart body to be uploaded. The body is produced according
   // to RFC 2046.
   void SetupMultipart(std::string* post_data, uint8* log_buffer,
                       uint32 log_buffer_length,
                       const std::map<std::string, std::string>& meta_data);
 
   void AddLogData(std::string* post_data, uint8* log_buffer,
                   uint32 log_buffer_length);
   void CompressLog(std::string* post_data, uint8* input, uint32 input_size);
   void ResizeForNextOutput(std::string* post_data, z_stream* stream);
 
   void CreateAndStartURLFetcher(
-      scoped_refptr<net::URLRequestContextGetter> request_context,
       const WebRtcLogUploadDoneData& upload_done_data,
       scoped_ptr<std::string> post_data);
 
   void DecreaseLogCount();
 
   // Append information (time and report ID) about this uploaded log to a log
   // list file, limited to |kLogListLimitLines| entries. This list is used for
   // viewing the uploaded logs under chrome://webrtc-logs, see
   // WebRtcLogUploadList. The list has the format
   // time,id
   // time,id
   // etc.
   // where each line represents an uploaded log and "time" is Unix time.
   void AddUploadedLogInfoToUploadListFile(
       const base::FilePath& upload_list_path,
       const std::string& report_id);
 
   void NotifyUploadDone(int response_code,
                         const std::string& report_id,
                         const WebRtcLogUploadDoneData& upload_done_data);
 
   // This is the UI thread for Chromium. Some other thread for tests.
   base::ThreadChecker create_thread_checker_;
 
   // This is the FILE thread for Chromium. Some other thread for tests.
   base::ThreadChecker file_thread_checker_;
 
+  // Keeps track of number of currently open logs. Must be accessed on the UI
+  // thread.
   int log_count_;
 
+  // The URLFetchers used for uploading. Must be accessed on the UI thread.
+  typedef std::vector<scoped_ptr<net::URLFetcher> > URLFetcherVector;
+  URLFetcherVector url_fetchers_;
+
   // For testing purposes, see OverrideUploadWithBufferForTesting. Only accessed
   // on the FILE thread.
   std::string* post_data_;
 
   typedef std::map<const net::URLFetcher*, WebRtcLogUploadDoneData>
       UploadDoneDataMap;
   // Only accessed on the UI thread.
   UploadDoneDataMap upload_done_data_;
 
   DISALLOW_COPY_AND_ASSIGN(WebRtcLogUploader);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_WEBRTC_LOG_UPLOADER_H_