Enable adaptive playback for spitzer, use conservative size.

content/common/gpu/media/android_video_decode_accelerator.h

Index: content/common/gpu/media/android_video_decode_accelerator.h
diff --git a/content/common/gpu/media/android_video_decode_accelerator.h b/content/common/gpu/media/android_video_decode_accelerator.h
index 272a6a01a27c20382d68ff01ece2ac7a5a136580..1e0543d3fc5f228e356ac47c0d131a0992ddc99a 100644
--- a/content/common/gpu/media/android_video_decode_accelerator.h
+++ b/content/common/gpu/media/android_video_decode_accelerator.h
@@ -184,6 +184,10 @@ class CONTENT_EXPORT AndroidVideoDecodeAccelerator
     // an encrypted stream.
     media::MediaDrmBridgeCdmContext::JavaObjectPtr media_crypto_;
 
+    // Initial coded size.  The actual size might change at any time, so this
+    // is only a hint.
+    gfx::Size initial_expected_coded_size_;
+
    protected:
     friend class base::RefCountedThreadSafe<CodecConfig>;
     virtual ~CodecConfig();