Re-land "Convert native handles to buffers before encoding."

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

Index: talk/app/webrtc/java/jni/native_handle_impl.h
diff --git a/talk/app/webrtc/java/jni/native_handle_impl.h b/talk/app/webrtc/java/jni/native_handle_impl.h
index 8c8769611870fe1c0fed315f7aa3140310ba42de..cdb72ff4d59f3eead9a52b3687e92110f6060951 100644
--- a/talk/app/webrtc/java/jni/native_handle_impl.h
+++ b/talk/app/webrtc/java/jni/native_handle_impl.h
@@ -29,6 +29,9 @@
 #ifndef TALK_APP_WEBRTC_JAVA_JNI_NATIVE_HANDLE_IMPL_H_
 #define TALK_APP_WEBRTC_JAVA_JNI_NATIVE_HANDLE_IMPL_H_
 
+#include "webrtc/base/checks.h"
+#include "webrtc/common_video/interface/video_frame_buffer.h"
+
 namespace webrtc_jni {
 
 // Wrapper for texture object.
@@ -52,6 +55,23 @@ class NativeHandleImpl {
   int32_t texture_id_;
 };
 
+class JniNativeHandleBuffer : public webrtc::NativeHandleBuffer {
+ public:
+  JniNativeHandleBuffer(void* native_handle, int width, int height)
+      : NativeHandleBuffer(native_handle, width, height) {}
+
+  // TODO(pbos): Override destructor to release native handle, at the moment the
+  // native handle is not released based on refcount.
+
+ private:
+  rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() override {
+    // TODO(pbos): Implement before using this in the encoder pipeline (or
+    // remove the CHECK() in VideoCapture).
+    RTC_NOTREACHED();
+    return nullptr;
+  }
+};
+
 }  // namespace webrtc_jni
 
 #endif  // TALK_APP_WEBRTC_JAVA_JNI_NATIVE_HANDLE_IMPL_H_