Implement AndroidTextureBuffer::NativeToI420.

talk/app/webrtc/java/jni/native_handle_impl.h

 /*
  * libjingle
  * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 32 matching lines @@
 
   const int oes_texture_id;
   float sampling_matrix[16];
 };
 
 class AndroidTextureBuffer : public webrtc::NativeHandleBuffer {
  public:
   AndroidTextureBuffer(int width,
                        int height,
                        const NativeHandleImpl& native_handle,
+                       jobject surface_texture_helper,
                        const rtc::Callback0<void>& no_longer_used);
   ~AndroidTextureBuffer();
   rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() override;
 
   rtc::scoped_refptr<AndroidTextureBuffer> CropAndScale(
       int cropped_input_width,
       int cropped_input_height,
       int dst_widht,
       int dst_height);
 
  private:
   NativeHandleImpl native_handle_;
+  // Raw object pointer, relying on the caller, i.e.,
+  // AndroidVideoCapturerJni or the C++ SurfaceTextureHelper, to keep
+  // a global reference. TODO(nisse): Make this a reference to the C++
+  // SurfaceTextureHelper instead, but that requires some refactoring
+  // of AndroidVideoCapturerJni.
+  jobject surface_texture_helper_;
   rtc::Callback0<void> no_longer_used_cb_;
 };
 
 }  // namespace webrtc_jni
 
 #endif  // TALK_APP_WEBRTC_JAVA_JNI_NATIVE_HANDLE_IMPL_H_