media: Fix a GpuVideoDecoder initialization crash on Android

media/filters/gpu_video_decoder.h

Index: media/filters/gpu_video_decoder.h
diff --git a/media/filters/gpu_video_decoder.h b/media/filters/gpu_video_decoder.h
index 1f999cbe0ffe8de3f7ea341ea187b6702768df61..45c5b202d0090476d7b46434bd292d602569f774 100644
--- a/media/filters/gpu_video_decoder.h
+++ b/media/filters/gpu_video_decoder.h
@@ -178,6 +178,10 @@ class MEDIA_EXPORT GpuVideoDecoder
   // occurs.
   std::unique_ptr<VideoDecodeAccelerator> vda_;
 
+  // Whether |vda_->Initialize()| has been called. This is used to avoid
+  // calling Initialize() again while a deferred initialization is in progress.
+  bool vda_initialized_;
+
   InitCB init_cb_;
   OutputCB output_cb_;