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 68eafa1e0378d4acc7ff4818015f1ca5c20f01f8..b3040f5799dd1c2fa6691db4a17cab4155324d98 100644
--- a/content/renderer/media/webmediaplayer_impl.cc
+++ b/content/renderer/media/webmediaplayer_impl.cc
@@ -634,7 +634,9 @@ 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->texture_target != GL_TEXTURE_2D)
     return false;
 
   // Since this method changes which texture is bound to the TEXTURE_2D target,
@@ -649,15 +651,12 @@ 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());
+  web_graphics_context->waitSyncPoint(mailbox_holder->sync_point);
   web_graphics_context->bindTexture(GL_TEXTURE_2D, source_texture);
   web_graphics_context->consumeTextureCHROMIUM(GL_TEXTURE_2D,
-                                               mailbox_holder->mailbox().name);
+                                               mailbox_holder->mailbox.name);
 
   // The video is stored in a unmultiplied format, so premultiply
   // if necessary.