Add gpu::MailboxHolder to hold state for a gpu::Mailbox

content/renderer/media/webmediaplayer_impl.cc

Index: content/renderer/media/webmediaplayer_impl.cc
diff --git a/content/renderer/media/webmediaplayer_impl.cc b/content/renderer/media/webmediaplayer_impl.cc
index 929c74c149f10d76eed58e41845f4ac08701404e..40d1c6e107873baf9539ebcdcc30cd755bb3eb57 100644
--- a/content/renderer/media/webmediaplayer_impl.cc
+++ b/content/renderer/media/webmediaplayer_impl.cc
@@ -637,7 +637,9 @@ bool WebMediaPlayerImpl::copyVideoTextureToPlatformTexture(
     return false;
   if (video_frame->format() != media::VideoFrame::NATIVE_TEXTURE)
     return false;
-  if (video_frame->texture_target() != GL_TEXTURE_2D)
+
+  gpu::MailboxHolder* mailbox_holder = video_frame->mailbox_holder();
+  if (mailbox_holder->target() != GL_TEXTURE_2D)
     return false;
 
   // Since this method changes which texture is bound to the TEXTURE_2D target,
@@ -652,9 +654,6 @@ bool WebMediaPlayerImpl::copyVideoTextureToPlatformTexture(
     DCHECK_EQ(static_cast<GLuint>(bound_texture), texture);
   }
 
-  media::VideoFrame::MailboxHolder* mailbox_holder =
-      video_frame->texture_mailbox();
-
   uint32 source_texture = web_graphics_context->createTexture();
 
   web_graphics_context->waitSyncPoint(mailbox_holder->sync_point());