Android: Make VideoCapturer an interface for all VideoCapturers to implement

webrtc/api/java/jni/androidvideocapturer_jni.h

 /*
  *  Copyright 2015 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 24 matching lines @@
   AndroidVideoCapturerJni(JNIEnv* jni,
                           jobject j_video_capturer,
                           jobject j_surface_texture_helper);
 
   void Start(int width, int height, int framerate,
              webrtc::AndroidVideoCapturer* capturer) override;
   void Stop() override;
 
   std::string GetSupportedFormats() override;
 
-  // Called from VideoCapturerAndroid::NativeObserver on a Java thread.
+  // Called from VideoCapturer::NativeObserver on a Java thread.
   void OnCapturerStarted(bool success);
   void OnMemoryBufferFrame(void* video_frame, int length, int width,
                            int height, int rotation, int64_t timestamp_ns);
   void OnTextureFrame(int width, int height, int rotation, int64_t timestamp_ns,
                       const NativeHandleImpl& handle);
   void OnOutputFormatRequest(int width, int height, int fps);
 
  protected:
   ~AndroidVideoCapturerJni();
 
@@ skipping 33 matching lines @@
   rtc::scoped_ptr<rtc::GuardedAsyncInvoker> invoker_ GUARDED_BY(capturer_lock_);
 
   static jobject application_context_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(AndroidVideoCapturerJni);
 };
 
 }  // namespace webrtc_jni
 
 #endif  // WEBRTC_API_JAVA_JNI_ANDROIDVIDEOCAPTURER_JNI_H_