Revert of Win Video Capture: Create an STA |video_capture_thread_| from MediaStreamManager.

Revert of Win Video Capture: Create an STA |video_capture_thread_| from MediaStreamManager. (patchset #2 id:20001 of https://codereview.chromium.org/700503002/)

Reason for revert:
content_browsertests are failing on the main waterfall (http://build.chromium.org/p/chromium.linux/builders/Android%20Tests%20%28dbg%29/builds/23894/steps/content_browsertests/logs/stdio) as well as trybots.

Original issue's description:
> Win Video Capture: Create an STA |video_capture_thread_| from MediaStreamManager.
>
> YCWebCameraSource.ax causes a huge amount of Chrome crashes. This CL
> changes the initialization model of the Device Thread, a.k.a Audio
> Thread, from Multiple Thread appartment model to Single Thread model,
> MTA -> STA.
>
> We'll monitor the crash rate in the Canaries to see if it has the
> desired effect.
>
> BUG=427192, 421991
>
> Adding this since the android_dbg_tests_recipe bot seems stalled.
> NOTRY=true
>
> Committed: https://crrev.com/90ec5d341eb859647217c371dbe2508f1c838827
> Cr-Commit-Position: refs/heads/master@{#302596}

TBR=tommi@chromium.org,mcasas@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=427192, 421991
Committed: https://crrev.com/b312062c4f516a5d2a98fbb714478109e670d9fe
Cr-Commit-Position: refs/heads/master@{#302606}

[Bernhard Bauer, 2014-11-04 14:32:24]

Created Revert of Win Video Capture: Create an STA |video_capture_thread_| from
MediaStreamManager.

[Bernhard Bauer, 2014-11-04 14:35:43]

The CQ bit was checked by bauerb@chromium.org

[commit-bot: I haz the power, 2014-11-04 14:37:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/702703002/1

[commit-bot: I haz the power, 2014-11-04 14:38:40]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-04 14:39:13]

Patchset 1 (id:??) landed as
https://crrev.com/b312062c4f516a5d2a98fbb714478109e670d9fe
Cr-Commit-Position: refs/heads/master@{#302606}

[Bernhard Bauer, 2014-11-04 14:49:48]

FTR, the symbolized stack trace (from
http://build.chromium.org/p/chromium.linux/builders/Android%20Tests%20%28dbg%...):

[FATAL:ref_counted.h(312)] Assert failed: ptr_ != __null. 

Stack Trace:
  RELADDR   FUNCTION                                                            
                                    FILE:LINE
  006d756f  logging::LogMessage::~LogMessage()+42                               
                                    src/base/logging.cc:545
  003e790d  scoped_refptr<base::SingleThreadTaskRunner>::operator->() const+60  
                                    src/base/memory/ref_counted.h:312
(discriminator 13)
  01e02015  content::VideoCaptureManager::IsOnDeviceThread() const+6            
                                   
src/content/browser/renderer_host/media/video_capture_manager.cc:581
  01e02423 
content::VideoCaptureManager::DoStopDeviceOnDeviceThread(content::VideoCaptureManager::DeviceEntry*)+30
 src/content/browser/renderer_host/media/video_capture_manager.cc:524
  v------>  base::Callback<void ()>::Run() const                                
                                    src/base/callback.h:401 (discriminator 1)
  006be159  base::debug::TaskAnnotator::RunTask(char const*, char const*,
base::PendingTask const&)+428              src/base/debug/task_annotator.cc:63
(discriminator 1)
  006dd3fd  base::MessageLoop::RunTask(base::PendingTask const&)+192            
                                    src/base/message_loop/message_loop.cc:447
  006dd487  base::MessageLoop::DeferOrRunPendingTask(base::PendingTask
const&)+34                                   
src/base/message_loop/message_loop.cc:456
  006de7f9  base::MessageLoop::DoWork()+112                                     
                                    src/base/message_loop/message_loop.cc:565
  006dee35  base::MessagePumpDefault::Run(base::MessagePump::Delegate*)+88      
                                   
src/base/message_loop/message_pump_default.cc:32
  006de19f  base::MessageLoop::RunHandler()+82                                  
                                    src/base/message_loop/message_loop.cc:415
(discriminator 1)
  006edaa7  base::RunLoop::Run()+30                                             
                                    src/base/run_loop.cc:55
  006dccef  base::MessageLoop::Run()+14                                         
                                    src/base/message_loop/message_loop.cc:308
  006fede9  base::Thread::ThreadMain()+348                                      
                                    src/base/threading/thread.cc:228
  006fb63d  base::(anonymous namespace)::ThreadFunc(void*)+108                  
                                   
src/base/threading/platform_thread_posix.cc:80
  0000d173  <unknown>                                                           
                                    /system/lib/libc.so
  0000d30b  <unknown>                                                           
                                    /system/lib/libc.so

[Bernhard Bauer, 2014-11-04 14:52:24]

That did not turn out nicely... Without the line numbers:

  006d756f  logging::LogMessage::~LogMessage()+42
  003e790d  scoped_refptr<base::SingleThreadTaskRunner>::operator->() const+60
  01e02015  content::VideoCaptureManager::IsOnDeviceThread() const+6
  01e02423 
content::VideoCaptureManager::DoStopDeviceOnDeviceThread(content::VideoCaptureManager::DeviceEntry*)+30
  v------>  base::Callback<void ()>::Run() const
  006be159  base::debug::TaskAnnotator::RunTask(char const*, char const*,
base::PendingTask const&)+428
  006dd3fd  base::MessageLoop::RunTask(base::PendingTask const&)+192
  006dd487  base::MessageLoop::DeferOrRunPendingTask(base::PendingTask
const&)+34
  006de7f9  base::MessageLoop::DoWork()+112
  006dee35  base::MessagePumpDefault::Run(base::MessagePump::Delegate*)+88
  006de19f  base::MessageLoop::RunHandler()+82
  006edaa7  base::RunLoop::Run()+30
  006dccef  base::MessageLoop::Run()+14
  006fede9  base::Thread::ThreadMain()+348
  006fb63d  base::(anonymous namespace)::ThreadFunc(void*)+108
  0000d173  <unknown>
  0000d30b  <unknown>