Revert of Enforce MaxFrameDelayCount in VTVideoEncodeAccelerator and cleanups

media/gpu/vt_video_encode_accelerator_mac.h

Index: media/gpu/vt_video_encode_accelerator_mac.h
diff --git a/media/gpu/vt_video_encode_accelerator_mac.h b/media/gpu/vt_video_encode_accelerator_mac.h
index d596ffef134578d3320da15fc538c7c9520a8a64..a177b51f3742a7eafc3fca9e7ca2aac287004f7d 100644
--- a/media/gpu/vt_video_encode_accelerator_mac.h
+++ b/media/gpu/vt_video_encode_accelerator_mac.h
@@ -87,8 +87,12 @@
   // is configured using ConfigureCompressionSession().
   bool ResetCompressionSession();
 
-  // Create a compression session.
-  bool CreateCompressionSession(const gfx::Size& input_size);
+  // Create a compression session, with HW encoder enforced if
+  // |require_hw_encoding| is set.
+  bool CreateCompressionSession(
+      base::ScopedCFTypeRef<CFDictionaryRef> attributes,
+      const gfx::Size& input_size,
+      bool require_hw_encoding);
 
   // Configure the current compression session using current encoder settings.
   bool ConfigureCompressionSession();