This corrects/normalizes license headers in misc. files, such as
config files, docs, build tools, tests, and externs. This does not
affect the compiled output, and is only done for consistency.
Issue #2638
Change-Id: I9d8da2de55243b08d7df2b743aac73c6f15e858a
In player, SimpleTextDisplayer was set as the default TextDisplayer. In
our UI, it changes the configuration to use the UITextDisplayer, and
UITextDisplayer gets constructed with the player. Later in our demo, it
resets the config, so an extra SimpleTextDisplayer gets constructed.
This introduces an extra TextTrack created by SimpleTextDisplayer.
This change sets the UITextDisplayer as the default TextDisplayer in
player's default config.
Closes#2516
Change-Id: I3f653be9fad8b2edbc2fb9de84e8abb327dcfc51