Reland Remove unused cricket::VideoCapturer methods. Originally reviewed and landed as patchset #2 …

webrtc/media/engine/webrtcvideocapturer.cc

 /*
  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 244 matching lines @@
   VideoCapturer::OnSinkWantsChanged(wants);
   bool result = module_->SetApplyRotation(wants.rotation_applied);
   RTC_CHECK(result);
 
   return;
 }
 
 CaptureState WebRtcVideoCapturer::Start(const VideoFormat& capture_format) {
   if (!module_) {
     LOG(LS_ERROR) << "The capturer has not been initialized";
-    return CS_NO_DEVICE;
+    return CS_FAILED;
   }
   if (start_thread_) {
     LOG(LS_ERROR) << "The capturer is already running";
     RTC_DCHECK(start_thread_->IsCurrent())
         << "Trying to start capturer on different threads";
     return CS_FAILED;
   }
 
   start_thread_ = rtc::Thread::Current();
   RTC_DCHECK(!async_invoker_);
@@ skipping 141 matching lines @@
   pixel_width = 1;
   pixel_height = 1;
   // Convert units from VideoFrame RenderTimeMs to CapturedFrame (nanoseconds).
   time_stamp = sample.render_time_ms() * rtc::kNumNanosecsPerMillisec;
   data_size = rtc::checked_cast<uint32_t>(length);
   data = buffer;
   rotation = sample.rotation();
 }
 
 }  // namespace cricket