Convert WebRtcLoggingHandlerHost to use the blocking thread pool.

Also call base::GetLinuxDistro() on the blocking pool and not on the IO thread
because it may block.

Review URL: https://codereview.chromium.org/299903002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274615 0039d316-1c4b-4281-b951-d872f2087c98

7 files changed, 79 insertions, 72 deletions

diff --git a/chrome/browser/browsing_data/browsing_data_remover.cc b/chrome/browser/browsing_data/browsing_data_remover.cc
index da2bb2f..bd4e2fd 100644
--- a/chrome/browser/browsing_data/browsing_data_remover.cc
+++ b/chrome/browser/browsing_data/browsing_data_remover.cc
@@ -388,8 +388,7 @@ void BrowsingDataRemover::RemoveImpl(int remove_mask,
 
 #if defined(ENABLE_WEBRTC)
     waiting_for_clear_webrtc_logs_ = true;
-    BrowserThread::PostTaskAndReply(
-        BrowserThread::FILE,
+    BrowserThread::PostBlockingPoolTaskAndReply(
         FROM_HERE,
         base::Bind(
             &WebRtcLogUtil::DeleteOldAndRecentWebRtcLogFiles,
diff --git a/chrome/browser/media/webrtc_log_uploader.cc b/chrome/browser/media/webrtc_log_uploader.cc
index 98b22c3..a51404c 100644
--- a/chrome/browser/media/webrtc_log_uploader.cc
+++ b/chrome/browser/media/webrtc_log_uploader.cc
@@ -76,7 +76,7 @@ WebRtcLogUploader::WebRtcLogUploader()
     : log_count_(0),
       post_data_(NULL),
       shutting_down_(false) {
-  file_thread_checker_.DetachFromThread();
+  blocking_sequence_checker_.DetachFromSequence();
 }
 
 WebRtcLogUploader::~WebRtcLogUploader() {
@@ -102,8 +102,7 @@ void WebRtcLogUploader::OnURLFetchComplete(
       // TODO(jiayl): Add the RTP dump records to chrome://webrtc-logs.
       base::FilePath log_list_path =
           WebRtcLogList::GetWebRtcLogListFileForDirectory(it->second.log_path);
-      content::BrowserThread::PostTask(
-          content::BrowserThread::FILE,
+      content::BrowserThread::PostBlockingPoolTask(
           FROM_HERE,
           base::Bind(&WebRtcLogUploader::AddUploadedLogInfoToUploadListFile,
                      base::Unretained(this),
@@ -141,7 +140,7 @@ void WebRtcLogUploader::LoggingStoppedDoUpload(
     uint32 length,
     const std::map<std::string, std::string>& meta_data,
     const WebRtcLogUploadDoneData& upload_done_data) {
-  DCHECK(file_thread_checker_.CalledOnValidThread());
+  DCHECK(blocking_sequence_checker_.CalledOnValidSequencedThread());
   DCHECK(log_buffer.get());
   DCHECK(!upload_done_data.log_path.empty());
 
@@ -352,7 +351,7 @@ void WebRtcLogUploader::DecreaseLogCount() {
 void WebRtcLogUploader::WriteCompressedLogToFile(
     const std::vector<uint8>& compressed_log,
     const base::FilePath& log_file_path) {
-  DCHECK(file_thread_checker_.CalledOnValidThread());
+  DCHECK(blocking_sequence_checker_.CalledOnValidSequencedThread());
   DCHECK(!compressed_log.empty());
   base::WriteFile(log_file_path,
                   reinterpret_cast<const char*>(&compressed_log[0]),
@@ -362,7 +361,7 @@ void WebRtcLogUploader::WriteCompressedLogToFile(
 void WebRtcLogUploader::AddLocallyStoredLogInfoToUploadListFile(
     const base::FilePath& upload_list_path,
     const std::string& local_log_id) {
-  DCHECK(file_thread_checker_.CalledOnValidThread());
+  DCHECK(blocking_sequence_checker_.CalledOnValidSequencedThread());
   DCHECK(!upload_list_path.empty());
   DCHECK(!local_log_id.empty());
 
@@ -406,7 +405,7 @@ void WebRtcLogUploader::AddUploadedLogInfoToUploadListFile(
     const base::FilePath& upload_list_path,
     const std::string& local_log_id,
     const std::string& report_id) {
-  DCHECK(file_thread_checker_.CalledOnValidThread());
+  DCHECK(blocking_sequence_checker_.CalledOnValidSequencedThread());
   DCHECK(!upload_list_path.empty());
   DCHECK(!local_log_id.empty());
   DCHECK(!report_id.empty());
diff --git a/chrome/browser/media/webrtc_log_uploader.h b/chrome/browser/media/webrtc_log_uploader.h
index 86c2d3a..aa30bb2 100644
--- a/chrome/browser/media/webrtc_log_uploader.h
+++ b/chrome/browser/media/webrtc_log_uploader.h
@@ -11,6 +11,7 @@
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
+#include "base/sequence_checker.h"
 #include "base/threading/thread_checker.h"
 #include "chrome/browser/media/webrtc_logging_handler_host.h"
 #include "net/url_request/url_fetcher_delegate.h"
@@ -118,7 +119,7 @@ class WebRtcLogUploader : public net::URLFetcherDelegate {
 
   void DecreaseLogCount();
 
-  // Must be called on the FILE thread.
+  // Must be called on the blocking task pool.
   void WriteCompressedLogToFile(const std::vector<uint8>& compressed_log,
                                 const base::FilePath& log_file_path);
 
@@ -137,7 +138,7 @@ class WebRtcLogUploader : public net::URLFetcherDelegate {
   // "upload_time" and "report_id" is the left empty in the entry written to the
   // list file. If uploading is successful, AddUploadedLogInfoToUploadListFile()
   // is called and those empty items are filled out.
-  // Must be called on the FILE thread.
+  // Must be called on the blocking task pool.
   void AddLocallyStoredLogInfoToUploadListFile(
       const base::FilePath& upload_list_path,
       const std::string& local_log_id);
@@ -153,15 +154,15 @@ class WebRtcLogUploader : public net::URLFetcherDelegate {
   // 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_;
+  // This is the blocking task pool.
+  base::SequenceChecker blocking_sequence_checker_;
 
   // Keeps track of number of currently open logs. Must be accessed on the UI
   // thread.
   int log_count_;
 
   // For testing purposes, see OverrideUploadWithBufferForTesting. Only accessed
-  // on the FILE thread.
+  // on the blocking thread pool.
   std::string* post_data_;
 
   typedef std::map<const net::URLFetcher*, WebRtcLogUploadDoneData>
diff --git a/chrome/browser/media/webrtc_log_util.cc b/chrome/browser/media/webrtc_log_util.cc
index d443f27..d38625b 100644
--- a/chrome/browser/media/webrtc_log_util.cc
+++ b/chrome/browser/media/webrtc_log_util.cc
@@ -6,7 +6,9 @@
 
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
+#include "base/files/file_path.h"
 #include "base/logging.h"
+#include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/media/webrtc_log_list.h"
@@ -44,7 +46,7 @@ void WebRtcLogUtil::DeleteOldWebRtcLogFiles(const base::FilePath& log_dir) {
 void WebRtcLogUtil::DeleteOldAndRecentWebRtcLogFiles(
     const base::FilePath& log_dir,
     const base::Time& delete_begin_time) {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
+  base::ThreadRestrictions::AssertIOAllowed();
 
   if (!base::PathExists(log_dir)) {
     // This will happen if no logs have been stored or uploaded.
@@ -108,8 +110,7 @@ void WebRtcLogUtil::DeleteOldWebRtcLogFilesForAllProfiles() {
       g_browser_process->profile_manager()->GetProfileInfoCache();
   size_t profiles_count = profile_cache.GetNumberOfProfiles();
   for (size_t i = 0; i < profiles_count; ++i) {
-    content::BrowserThread::PostTask(
-        content::BrowserThread::FILE,
+    content::BrowserThread::PostBlockingPoolTask(
         FROM_HERE,
         base::Bind(&DeleteOldWebRtcLogFiles,
                    WebRtcLogList::GetWebRtcLogDirectoryForProfile(
diff --git a/chrome/browser/media/webrtc_log_util.h b/chrome/browser/media/webrtc_log_util.h
index 1bc1f95..af4d06a 100644
--- a/chrome/browser/media/webrtc_log_util.h
+++ b/chrome/browser/media/webrtc_log_util.h
@@ -5,19 +5,22 @@
 #ifndef CHROME_BROWSER_MEDIA_WEBRTC_LOG_UTIL_H_
 #define CHROME_BROWSER_MEDIA_WEBRTC_LOG_UTIL_H_
 
-#include "base/files/file_path.h"
-#include "base/time/time.h"
+namespace base {
+class FilePath;
+class Time;
+}
 
 class WebRtcLogUtil {
  public:
   // Deletes logs files older that 5 days. Updates the log file list. Must be
-  // called on the FILE thread.
+  // called on a thread that allows IO.
   static void DeleteOldWebRtcLogFiles(const base::FilePath& log_dir);
 
   // Deletes logs files older that 5 days and logs younger than
   // |delete_begin_time|. Updates the log file list. If |delete_begin_time| is
   // base::time::Max(), no recent logs will be deleted, and the function is
-  // equal to DeleteOldWebRtcLogFiles(). Must be called on the FILE thread.
+  // equal to DeleteOldWebRtcLogFiles(). Must be called on a thread that allows
+  // IO.
   static void DeleteOldAndRecentWebRtcLogFiles(
       const base::FilePath& log_dir,
       const base::Time& delete_begin_time);
diff --git a/chrome/browser/media/webrtc_logging_handler_host.cc b/chrome/browser/media/webrtc_logging_handler_host.cc
index 4d7b168..46a07df 100644
--- a/chrome/browser/media/webrtc_logging_handler_host.cc
+++ b/chrome/browser/media/webrtc_logging_handler_host.cc
@@ -7,25 +7,19 @@
 #include <string>
 
 #include "base/bind.h"
-#include "base/command_line.h"
 #include "base/cpu.h"
 #include "base/file_util.h"
 #include "base/logging.h"
-#include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/sys_info.h"
 #include "base/time/time.h"
 #include "chrome/browser/browser_process.h"
-#include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/media/webrtc_log_list.h"
 #include "chrome/browser/media/webrtc_log_uploader.h"
 #include "chrome/browser/media/webrtc_rtp_dump_handler.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/common/chrome_switches.h"
 #include "chrome/common/media/webrtc_logging_messages.h"
 #include "chrome/common/partial_circular_buffer.h"
-#include "chrome/common/pref_names.h"
-#include "chromeos/settings/cros_settings_names.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/gpu_data_manager.h"
@@ -43,6 +37,8 @@
 #endif
 
 #if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/settings/cros_settings.h"
+#include "chromeos/settings/cros_settings_names.h"
 #include "chromeos/system/statistics_provider.h"
 #endif
 
@@ -138,9 +134,9 @@ void WebRtcLoggingHandlerHost::SetMetaData(
     error_message = "Meta data must be set before stop or upload.";
   }
   bool success = error_message.empty();
-  content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
-                                   base::Bind(callback, success,
-                                              error_message));
+  BrowserThread::PostTask(BrowserThread::UI,
+                          FROM_HERE,
+                          base::Bind(callback, success, error_message));
 }
 
 void WebRtcLoggingHandlerHost::StartLogging(
@@ -178,7 +174,7 @@ void WebRtcLoggingHandlerHost::UploadLog(const UploadDoneCallback& callback) {
 
   if (logging_state_ != STOPPED) {
     if (!callback.is_null()) {
-      content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
+      BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
           base::Bind(callback, false, "", kLogNotStoppedOrNoLogOpen));
     }
     return;
@@ -186,8 +182,8 @@ void WebRtcLoggingHandlerHost::UploadLog(const UploadDoneCallback& callback) {
 
   upload_callback_ = callback;
   logging_state_ = UPLOADING;
-  content::BrowserThread::PostTaskAndReplyWithResult(
-      content::BrowserThread::FILE,
+  base::PostTaskAndReplyWithResult(
+      BrowserThread::GetBlockingPool(),
       FROM_HERE,
       base::Bind(&WebRtcLoggingHandlerHost::GetLogDirectoryAndEnsureExists,
                  this),
@@ -240,8 +236,8 @@ void WebRtcLoggingHandlerHost::StartRtpDump(
   stop_rtp_dump_callback_ = stop_callback;
 
   if (!rtp_dump_handler_) {
-    content::BrowserThread::PostTaskAndReplyWithResult(
-        content::BrowserThread::FILE,
+    base::PostTaskAndReplyWithResult(
+        BrowserThread::GetBlockingPool(),
         FROM_HERE,
         base::Bind(&WebRtcLoggingHandlerHost::GetLogDirectoryAndEnsureExists,
                    this),
@@ -305,8 +301,8 @@ void WebRtcLoggingHandlerHost::DumpRtpPacketOnIOThread(
     bool incoming) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
-  // |rtp_dump_handler_| could be NULL if we are waiting for the FILE thread to
-  // create/ensure the log directory.
+  // |rtp_dump_handler_| could be NULL if we are waiting for the blocking
+  // thread pool to create/ensure the log directory.
   if (rtp_dump_handler_) {
     rtp_dump_handler_->OnRtpPacket(
         packet_header.get(), header_length, packet_length, incoming);
@@ -319,9 +315,8 @@ void WebRtcLoggingHandlerHost::OnChannelClosing() {
     if (upload_log_on_render_close_) {
       logging_state_ = UPLOADING;
       logging_started_time_ = base::Time();
-
-      content::BrowserThread::PostTaskAndReplyWithResult(
-          content::BrowserThread::FILE,
+      base::PostTaskAndReplyWithResult(
+          BrowserThread::GetBlockingPool(),
           FROM_HERE,
           base::Bind(&WebRtcLoggingHandlerHost::GetLogDirectoryAndEnsureExists,
                      this),
@@ -330,7 +325,7 @@ void WebRtcLoggingHandlerHost::OnChannelClosing() {
       g_browser_process->webrtc_log_uploader()->LoggingStoppedDontUpload();
     }
   }
-  content::BrowserMessageFilter::OnChannelClosing();
+  BrowserMessageFilter::OnChannelClosing();
 }
 
 void WebRtcLoggingHandlerHost::OnDestruct() const {
@@ -405,23 +400,36 @@ void WebRtcLoggingHandlerHost::DoStartLogging() {
                               kWebRtcLogSize / 2,
                               false));
 
-  BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE, base::Bind(
-      &WebRtcLoggingHandlerHost::LogInitialInfoOnFileThread, this));
+  BrowserThread::PostBlockingPoolTask(
+      FROM_HERE,
+      base::Bind(&WebRtcLoggingHandlerHost::LogInitialInfoOnBlockingPool,
+                 this));
 }
 
-void WebRtcLoggingHandlerHost::LogInitialInfoOnFileThread() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
+void WebRtcLoggingHandlerHost::LogInitialInfoOnBlockingPool() {
+  DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
 
   net::NetworkInterfaceList network_list;
   net::GetNetworkList(&network_list,
                       net::EXCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES);
 
-  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE, base::Bind(
-      &WebRtcLoggingHandlerHost::LogInitialInfoOnIOThread, this, network_list));
+  std::string linux_distro;
+#if defined(OS_LINUX)
+  linux_distro = base::GetLinuxDistro();
+#endif
+
+  BrowserThread::PostTask(
+      BrowserThread::IO,
+      FROM_HERE,
+      base::Bind(&WebRtcLoggingHandlerHost::LogInitialInfoOnIOThread,
+                 this,
+                 network_list,
+                 linux_distro));
 }
 
 void WebRtcLoggingHandlerHost::LogInitialInfoOnIOThread(
-    const net::NetworkInterfaceList& network_list) {
+    const net::NetworkInterfaceList& network_list,
+    const std::string& linux_distro) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   // Log start time (current time). We don't use base/i18n/time_formatting.h
@@ -444,7 +452,7 @@ void WebRtcLoggingHandlerHost::LogInitialInfoOnIOThread(
                       base::SysInfo::OperatingSystemVersion() + " " +
                       base::SysInfo::OperatingSystemArchitecture());
 #if defined(OS_LINUX)
-  LogToCircularBuffer("Linux distribution: " + base::GetLinuxDistro());
+  LogToCircularBuffer("Linux distribution: " + linux_distro);
 #endif
 
   // CPU
@@ -515,7 +523,7 @@ void WebRtcLoggingHandlerHost::LogToCircularBuffer(const std::string& message) {
 }
 
 base::FilePath WebRtcLoggingHandlerHost::GetLogDirectoryAndEnsureExists() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
+  DCHECK(BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
   base::FilePath log_dir_path =
       WebRtcLogList::GetWebRtcLogDirectoryForProfile(profile_->GetPath());
   base::File::Error error;
@@ -566,13 +574,14 @@ void WebRtcLoggingHandlerHost::DoUploadLogAndRtpDumps(
   upload_done_data.host = this;
   upload_callback_.Reset();
 
-  BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE, base::Bind(
-      &WebRtcLogUploader::LoggingStoppedDoUpload,
-      base::Unretained(g_browser_process->webrtc_log_uploader()),
-      Passed(&log_buffer_),
-      kWebRtcLogSize,
-      meta_data_,
-      upload_done_data));
+  BrowserThread::PostBlockingPoolTask(
+      FROM_HERE,
+      base::Bind(&WebRtcLogUploader::LoggingStoppedDoUpload,
+                 base::Unretained(g_browser_process->webrtc_log_uploader()),
+                 Passed(&log_buffer_),
+                 kWebRtcLogSize,
+                 meta_data_,
+                 upload_done_data));
 
   meta_data_.clear();
   circular_buffer_.reset();
@@ -583,12 +592,10 @@ void WebRtcLoggingHandlerHost::FireGenericDoneCallback(
     bool success,
     const std::string& error_message) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-  DCHECK(!(*callback).is_null());
-  content::BrowserThread::PostTask(
-      content::BrowserThread::UI,
-      FROM_HERE,
-      base::Bind(*callback, success, error_message));
-  (*callback).Reset();
+  DCHECK(!callback->is_null());
+  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
+                          base::Bind(*callback, success, error_message));
+  callback->Reset();
 }
 
 void WebRtcLoggingHandlerHost::CreateRtpDumpHandlerAndStart(
@@ -598,8 +605,8 @@ void WebRtcLoggingHandlerHost::CreateRtpDumpHandlerAndStart(
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   // |rtp_dump_handler_| may be non-NULL if StartRtpDump is called again before
-  // GetLogDirectoryAndEnsureExists returns on the FILE thread for a previous
-  // StartRtpDump.
+  // GetLogDirectoryAndEnsureExists returns on the blocking thread pool for a
+  // previous StartRtpDump.
   if (!rtp_dump_handler_)
     rtp_dump_handler_.reset(new WebRtcRtpDumpHandler(dump_dir));
 
diff --git a/chrome/browser/media/webrtc_logging_handler_host.h b/chrome/browser/media/webrtc_logging_handler_host.h
index dfff8c3..493dd01 100644
--- a/chrome/browser/media/webrtc_logging_handler_host.h
+++ b/chrome/browser/media/webrtc_logging_handler_host.h
@@ -14,10 +14,6 @@
 #include "content/public/browser/render_process_host.h"
 #include "net/base/net_util.h"
 
-namespace net {
-class URLRequestContextGetter;
-}  // namespace net
-
 class PartialCircularBuffer;
 class Profile;
 
@@ -136,8 +132,9 @@ class WebRtcLoggingHandlerHost : public content::BrowserMessageFilter {
 
   void StartLoggingIfAllowed();
   void DoStartLogging();
-  void LogInitialInfoOnFileThread();
-  void LogInitialInfoOnIOThread(const net::NetworkInterfaceList& network_list);
+  void LogInitialInfoOnBlockingPool();
+  void LogInitialInfoOnIOThread(const net::NetworkInterfaceList& network_list,
+                                const std::string& linux_distro);
   void NotifyLoggingStarted();
 
   // Writes a formatted log |message| to the |circular_buffer_|.
@@ -176,7 +173,7 @@ class WebRtcLoggingHandlerHost : public content::BrowserMessageFilter {
   scoped_ptr<PartialCircularBuffer> circular_buffer_;
 
   // The profile associated with our renderer process.
-  Profile* profile_;
+  const Profile* const profile_;
 
   // These are only accessed on the IO thread, except when in STARTING state. In
   // this state we are protected since entering any function that alters the