Define EncodedVideoSource and RtcCapturedEncodingVideoCapturer.

content/renderer/media/video_capture_impl_manager.cc

Index: content/renderer/media/video_capture_impl_manager.cc
diff --git a/content/renderer/media/video_capture_impl_manager.cc b/content/renderer/media/video_capture_impl_manager.cc
index 672fbd403c3374b0ed97a645119027e29808e7a9..07d0a834cabccbcb8b5016163d0363ca22dbf6ad 100644
--- a/content/renderer/media/video_capture_impl_manager.cc
+++ b/content/renderer/media/video_capture_impl_manager.cc
@@ -6,6 +6,7 @@
 
 #include "base/bind.h"
 #include "base/stl_util.h"
+#include "content/renderer/media/rtc_encoding_video_capturer_factory.h"
 #include "content/renderer/media/video_capture_impl.h"
 #include "content/renderer/media/video_capture_message_filter.h"
 
@@ -16,6 +17,10 @@ VideoCaptureImplManager::VideoCaptureImplManager()
   thread_.Start();
   message_loop_proxy_ = thread_.message_loop_proxy();
   filter_ = new VideoCaptureMessageFilter();
+
+#if defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL)
+  encoding_capturer_factory_ = new RtcEncodingVideoCapturerFactory();

[Ami GONE FROM CHROMIUM, 2013/06/12 01:44:06]

Are you planning to hold off landing this CL until all the rest of the machinery
lands (sheu@'s CLs)?  Because if you don't, then this will break the use cases
in question on cros/arm.  I think you want a runtime flag.

[hshi1, 2013/06/12 17:52:39]

Theoretically this wouldn't "break" cros/arm, because if the browser-side is not
implemented then no encoding capabilities will be reported, thus no caps will be
exposed by the factory, and no external encoder would be created by libjingle,
and we'll never go through the rest of the EVS stuff.

But you're probably right that things could go unpredictably wrong with the
browser-side unimplemented. Will update later today.

+#endif
 }
 
 media::VideoCapture* VideoCaptureImplManager::AddDevice(
@@ -30,6 +35,8 @@ media::VideoCapture* VideoCaptureImplManager::AddDevice(
         new VideoCaptureImpl(id, message_loop_proxy_.get(), filter_.get());
     devices_[id] = new Device(vc, handler);
     vc->Init();
+    if (encoding_capturer_factory_)
+      encoding_capturer_factory_->OnEncodedVideoSourceAdded(vc);
     return vc;
   }
 
@@ -59,6 +66,9 @@ void VideoCaptureImplManager::RemoveDevice(
   if (size == it->second->clients.size() || size > 1)
     return;
 
+  if (encoding_capturer_factory_)
+    encoding_capturer_factory_->OnEncodedVideoSourceRemoved(devices_[id]->vc);
+
   devices_[id]->vc->DeInit(base::Bind(&VideoCaptureImplManager::FreeDevice,
                                       this, devices_[id]->vc));
   delete devices_[id];