Minor cleanup to remove the static thread-safe methods on BrowserMainLoop. Initially I thought this…

chrome/browser/media/media_capture_devices_dispatcher.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 "chrome/browser/media/media_capture_devices_dispatcher.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
 #include "base/sha1.h"
@@ skipping 119 matching lines @@
 
 void MediaCaptureDevicesDispatcher::RemoveObserver(Observer* observer) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   observers_.RemoveObserver(observer);
 }
 
 const MediaStreamDevices&
 MediaCaptureDevicesDispatcher::GetAudioCaptureDevices() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (!is_device_enumeration_disabled_ && !devices_enumerated_) {
-    BrowserThread::PostTask(
-        BrowserThread::IO, FROM_HERE,
-        base::Bind(&content::EnsureMonitorCaptureDevices));
+    content::EnsureMonitorCaptureDevices();
     devices_enumerated_ = true;
   }
   return audio_devices_;
 }
 
 const MediaStreamDevices&
 MediaCaptureDevicesDispatcher::GetVideoCaptureDevices() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (!is_device_enumeration_disabled_ && !devices_enumerated_) {
-    BrowserThread::PostTask(
-        BrowserThread::IO, FROM_HERE,
-        base::Bind(&content::EnsureMonitorCaptureDevices));
+    content::EnsureMonitorCaptureDevices();
     devices_enumerated_ = true;
   }
   return video_devices_;
 }
 
 void MediaCaptureDevicesDispatcher::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
@@ skipping 311 matching lines @@
     int render_process_id,
     int render_view_id,
     const content::MediaStreamDevice& device,
     content::MediaRequestState state) {
   FOR_EACH_OBSERVER(Observer, observers_,
                     OnRequestUpdate(render_process_id,
                                     render_view_id,
                                     device,
                                     state));
 }