Implement Linux media notifier.

content/browser/browser_main_loop.cc

 // 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.
 
 #include "content/browser/browser_main_loop.h"
 
+#include <string>
+
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/string_number_conversions.h"
 #include "base/threading/thread_restrictions.h"
 #include "content/browser/browser_thread_impl.h"
@@ skipping 30 matching lines @@
 #include <windows.h>
 #include <commctrl.h>
 #include <ole2.h>
 #include <shellapi.h>
 
 #include "content/browser/system_message_window_win.h"
 #include "ui/base/l10n/l10n_util_win.h"
 #include "net/base/winsock_init.h"
 #endif
 
+#if defined(OS_LINUX)
+#include "content/browser/media_device_notifications_linux.h"
+#endif
+
+#if defined(OS_MACOSX)
+#include "content/browser/mac/media_device_notifications.h"
+#endif
+
 #if defined(OS_LINUX) || defined(OS_OPENBSD)
 #include <glib-object.h>
 #endif
 
 #if defined(OS_CHROMEOS)
 #include <dbus/dbus-glib.h>
 #endif
 
 #if defined(TOOLKIT_USES_GTK)
 #include "ui/gfx/gtk_util.h"
@@ skipping 130 matching lines @@
 
 void ImmediateShutdownAndExitProcess() {
   BrowserShutdownImpl::ImmediateShutdownAndExitProcess();
 }
 
 // static
 AudioManager* BrowserMainLoop::GetAudioManager() {
   return g_current_browser_main_loop->audio_manager_.get();
 }
 
-// BrowserMainLoop construction / destructione =============================
+// BrowserMainLoop construction / destruction =============================
 
 BrowserMainLoop::BrowserMainLoop(const content::MainFunctionParams& parameters)
     : parameters_(parameters),
       parsed_command_line_(parameters.command_line),
       result_code_(content::RESULT_CODE_NORMAL_EXIT) {
   DCHECK(!g_current_browser_main_loop);
   g_current_browser_main_loop = this;
 #if defined(OS_WIN)
   OleInitialize(NULL);
 #endif
@@ skipping 104 matching lines @@
     TraceController::GetInstance()->InitStartupTracing(parsed_command_line_);
 
   system_monitor_.reset(new base::SystemMonitor);
   hi_res_timer_manager_.reset(new HighResolutionTimerManager);
 
   network_change_notifier_.reset(net::NetworkChangeNotifier::Create());
   audio_manager_.reset(AudioManager::Create());
 
 #if defined(OS_WIN)
   system_message_window_.reset(new SystemMessageWindowWin);
+#elif defined(OS_MACOSX)
+  StartMediaDeviceNotifications();
 #endif
 
   // Prior to any processing happening on the io thread, we create the
   // plugin service as it is predominantly used from the io thread,
   // but must be created on the main thread. The service ctor is
   // inexpensive and does not invoke the io_thread() accessor.
   PluginService::GetInstance()->Init();
 
   if (parts_.get())
     parts_->PostMainMessageLoopStart();
@@ skipping 238 matching lines @@
 
   // Register the main thread by instantiating it, but don't call any methods.
   main_thread_.reset(new BrowserThreadImpl(BrowserThread::UI,
                                            MessageLoop::current()));
 }
 
 
 void BrowserMainLoop::BrowserThreadsStarted() {
   // RDH needs the IO thread to be created.
   resource_dispatcher_host_.reset(new ResourceDispatcherHost());
+
+#if defined(OS_LINUX)
+  // MediaDeviceNotificationsLinux needs the File Thread.
+  const FilePath kDefaultMtabPath("/etc/mtab");

[vandebo (ex-Chrome), 2012/03/06 00:41:40]

Random thought - does this work on CrOS?  It should, but crazy stuff might be
going on.

[Lei Zhang, 2012/03/06 19:00:25]

It should based on our observations on a Chromebook in dev mode.

+  media_device_notifications_linux_ =
+      new MediaDeviceNotificationsLinux(kDefaultMtabPath);
+  BrowserThread::PostTask(
+      BrowserThread::FILE, FROM_HERE,
+      base::Bind(&MediaDeviceNotificationsLinux::InitOnFileThread,
+                 media_device_notifications_linux_.get()));
+#endif
 }
 
 void BrowserMainLoop::InitializeToolkit() {
   // TODO(evan): this function is rather subtle, due to the variety
   // of intersecting ifdefs we have.  To keep it easy to follow, there
   // are no #else branches on any #ifs.
   // TODO(stevenjb): Move platform specific code into platform specific Parts
   // (Need to add InitializeToolkit stage to BrowserParts).
 #if defined(OS_LINUX) || defined(OS_OPENBSD)
   // Glib type system initialization. Needed at least for gconf,
@@ skipping 38 matching lines @@
     MessageLoopForUI::current()->PostTask(FROM_HERE, *parameters_.ui_task);
 
 #if defined(OS_MACOSX)
   MessageLoopForUI::current()->Run();
 #else
   MessageLoopForUI::current()->RunWithDispatcher(NULL);
 #endif
 }
 
 }  // namespace content