Remove ignored return code from modules.

webrtc/media/engine/fakewebrtcvideocapturemodule.h

 /*
  *  Copyright (c) 2004 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 12 matching lines @@
 class FakeWebRtcVideoCaptureModule : public webrtc::VideoCaptureModule {
  public:
   FakeWebRtcVideoCaptureModule(FakeWebRtcVcmFactory* factory, int32_t id)
       : factory_(factory),
         id_(id),
         callback_(NULL),
         running_(false),
         delay_(0) {
   }
   int64_t TimeUntilNextProcess() override { return 0; }
-  int32_t Process() override { return 0; }
+  void Process() override {}
   void RegisterCaptureDataCallback(
       webrtc::VideoCaptureDataCallback& callback) override {
     callback_ = &callback;
   }
   void DeRegisterCaptureDataCallback() override { callback_ = NULL; }
   void RegisterCaptureCallback(
       webrtc::VideoCaptureFeedBack& callback) override {
     // Not implemented.
   }
   void DeRegisterCaptureCallback() override {
@@ skipping 69 matching lines @@
 
   FakeWebRtcVcmFactory* factory_;
   int id_;
   webrtc::VideoCaptureDataCallback* callback_;
   bool running_;
   webrtc::VideoCaptureCapability cap_;
   int delay_;
 };
 
 #endif  // WEBRTC_MEDIA_ENGINE_FAKEWEBRTCVIDEOCAPTUREMODULE_H_