Reland of move the old AndroidVideoCapturer stack code. (patchset #1 id:1 of https://codereview.webrtc.org/2291583002/ )

Reason for revert:
Downstream apps should now be fixed.

Original issue's description:
> Revert of Remove the old AndroidVideoCapturer stack code. (patchset #2 id:20001 of https://codereview.webrtc.org/2235893003/ )
>
> Reason for revert:
> Breaks downstream.
>
> Original issue's description:
> > Remove the old AndroidVideoCapturer stack code.
> >
> > This code is no longer needed. Apps should be using the new API introduced here: https://codereview.webrtc.org/2127893002/
> >
> > Committed: https://crrev.com/1b365a8db070f9cdcbf35ec871f758dcd909e51d
> > Cr-Commit-Position: refs/heads/master@{#13950}
>
> TBR=magjed@webrtc.org,glaznev@webrtc.org,kjellander@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
>
> Committed: https://crrev.com/e39f251dacf66e50153bcda615f06b7c59e5856b
> Cr-Commit-Position: refs/heads/master@{#13958}

TBR=magjed@webrtc.org,glaznev@webrtc.org,kjellander@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.

Review-Url: https://codereview.webrtc.org/2298063003
Cr-Commit-Position: refs/heads/master@{#13988}

Author: sakal

webrtc/api/BUILD.gn

@@ -157,8 +157,6 @@ if (is_android && !build_with_chromium) {
       "android/jni/androidmetrics_jni.cc",
       "android/jni/androidnetworkmonitor_jni.cc",
       "android/jni/androidnetworkmonitor_jni.h",
-      "android/jni/androidvideocapturer_jni.cc",
-      "android/jni/androidvideocapturer_jni.h",
       "android/jni/androidvideotracksource_jni.cc",
       "android/jni/classreferenceholder.cc",
       "android/jni/classreferenceholder.h",
@@ -169,8 +167,6 @@ if (is_android && !build_with_chromium) {
       "android/jni/peerconnection_jni.cc",
       "android/jni/surfacetexturehelper_jni.cc",
       "android/jni/surfacetexturehelper_jni.h",
-      "androidvideocapturer.cc",
-      "androidvideocapturer.h",
       "androidvideotracksource.cc",
       "androidvideotracksource.h",
     ]

webrtc/api/android/java/src/org/webrtc/PeerConnectionFactory.java

@@ -111,21 +111,10 @@ public MediaStream createLocalMediaStream(String label) {
         nativeCreateLocalMediaStream(nativeFactory, label));
   }
 
-  // The VideoSource takes ownership of |capturer|, so capturer.dispose() should not be called
-  // manually after this. Video capturer is automatically started so there is no need to call
-  // startCapture after this method.
-  public VideoSource createVideoSource(
-      VideoCapturer capturer, MediaConstraints constraints) {
-    final EglBase.Context eglContext =
-        localEglbase == null ? null : localEglbase.getEglBaseContext();
-    return new VideoSource(nativeCreateVideoSource(nativeFactory,
-        eglContext, capturer, constraints));
-  }
-
   public VideoSource createVideoSource(VideoCapturer capturer) {
     final EglBase.Context eglContext =
         localEglbase == null ? null : localEglbase.getEglBaseContext();
-    long nativeAndroidVideoTrackSource = nativeCreateVideoSource2(nativeFactory, eglContext);
+    long nativeAndroidVideoTrackSource = nativeCreateVideoSource(nativeFactory, eglContext);
     VideoCapturer.CapturerObserver capturerObserver
         = new VideoCapturer.AndroidVideoTrackSourceObserver(nativeAndroidVideoTrackSource);
     nativeInitializeVideoCapturer(nativeFactory, capturer, nativeAndroidVideoTrackSource,
@@ -248,10 +237,6 @@ private static native long nativeCreateLocalMediaStream(
       long nativeFactory, String label);
 
   private static native long nativeCreateVideoSource(
-      long nativeFactory, EglBase.Context eglContext, VideoCapturer videoCapturer,
-      MediaConstraints constraints);
-
-  private static native long nativeCreateVideoSource2(
       long nativeFactory, EglBase.Context eglContext);
 
   private static native void nativeInitializeVideoCapturer(

webrtc/api/android/java/src/org/webrtc/VideoCapturer.java

@@ -39,53 +39,6 @@ void onTextureFrameCaptured(
     void onOutputFormatRequest(int width, int height, int framerate);
   }
 
-  // An implementation of CapturerObserver that forwards all calls from
-  // Java to the C layer.
-  static class NativeObserver implements CapturerObserver {
-    private final long nativeCapturer;
-
-    public NativeObserver(long nativeCapturer) {
-      this.nativeCapturer = nativeCapturer;
-    }
-
-    @Override
-    public void onCapturerStarted(boolean success) {
-      nativeCapturerStarted(nativeCapturer, success);
-    }
-
-    @Override
-    public void onCapturerStopped() {}
-
-    @Override
-    public void onByteBufferFrameCaptured(byte[] data, int width, int height,
-        int rotation, long timeStamp) {
-      nativeOnByteBufferFrameCaptured(nativeCapturer, data, data.length, width, height, rotation,
-          timeStamp);
-    }
-
-    @Override
-    public void onTextureFrameCaptured(
-        int width, int height, int oesTextureId, float[] transformMatrix, int rotation,
-        long timestamp) {
-      nativeOnTextureFrameCaptured(nativeCapturer, width, height, oesTextureId, transformMatrix,
-          rotation, timestamp);
-    }
-
-    @Override
-    public void onOutputFormatRequest(int width, int height, int framerate) {
-      nativeOnOutputFormatRequest(nativeCapturer, width, height, framerate);
-    }
-
-    private native void nativeCapturerStarted(long nativeCapturer,
-        boolean success);
-    private native void nativeOnByteBufferFrameCaptured(long nativeCapturer,
-        byte[] data, int length, int width, int height, int rotation, long timeStamp);
-    private native void nativeOnTextureFrameCaptured(long nativeCapturer, int width, int height,
-        int oesTextureId, float[] transformMatrix, int rotation, long timestamp);
-    private native void nativeOnOutputFormatRequest(long nativeCapturer,
-        int width, int height, int framerate);
-  }
-
   // An implementation of CapturerObserver that forwards all calls from
   // Java to the C layer.
   static class AndroidVideoTrackSourceObserver implements CapturerObserver {