Implement AndroidTextureBuffer::NativeToI420.

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 911a3c4fb690b81c1f395501c4f74824a695ed09..e8407abe2bb93061d80b1d32569201fe25a64595 100644
--- a/talk/app/webrtc/java/jni/native_handle_impl.h
+++ b/talk/app/webrtc/java/jni/native_handle_impl.h
@@ -39,9 +39,13 @@ namespace webrtc_jni {
 struct NativeHandleImpl {
   NativeHandleImpl(JNIEnv* jni,
                    jint j_oes_texture_id,
-                   jfloatArray j_transform_matrix);
+                   jfloatArray j_transform_matrix,
+                   jobject helper);
 
   const int oes_texture_id;
+  // Raw object pointer, relying on AndroidVideoCapturerJni to keep a

[magjed_webrtc, 2015/12/03 12:33:58]

Can't you place the |surface_texture_helper| in AndroidTextureBuffer instead?

[nisse-webrtc, 2015/12/03 13:35:21]

I can. And then the GetSurfaceHelper method is no longer needed.

I don't understand why things are divided between AndroidTextureBuffer and
NativeHandleImpl. Maybe there is, or was, a good reason.  

+  // global reference.
+  jobject surface_texture_helper;
   float sampling_matrix[16];
 };