[DO NOT COMMIT] MediaPlayerRenderer using StreamTextures.

media/media_options.gni

Index: media/media_options.gni
diff --git a/media/media_options.gni b/media/media_options.gni
index 33b39199f9421ee24cd0891319ab918a7fd7d963..1bd7fa61a7186cdd24887599fc6761b9ee917228 100644
--- a/media/media_options.gni
+++ b/media/media_options.gni
@@ -77,6 +77,11 @@ declare_args() {
   # Enable the TestMojoMediaClient to be used in MojoMediaApplication. This is
   # for testing only and will override the default platform MojoMediaClient.
   enable_test_mojo_media_client = false
+
+  # Enable and force the use of  the Mojo MediaPlayerRenderer.
+  # This flag is unafected by the |mojo_media_services|, because the service
+  # will always live in the browser process, regarless of |mojo_media_host|.
+  force_mojo_media_player_renderer = false
 }
 
 # Use a second declare_args() to pick up possible overrides of enable_mojo_media