UI: Rename MediaState to AlertState

chrome/browser/ui/cocoa/browser_window_controller.h

Index: chrome/browser/ui/cocoa/browser_window_controller.h
diff --git a/chrome/browser/ui/cocoa/browser_window_controller.h b/chrome/browser/ui/cocoa/browser_window_controller.h
index e305c5eb16c81fddb0955094780cdb3262d594cc..3649d47d5fb7051ba8be1a3410f144f38f03bb8f 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.h
+++ b/chrome/browser/ui/cocoa/browser_window_controller.h
@@ -380,12 +380,13 @@ class Command;
 - (void)executeExtensionCommand:(const std::string&)extension_id
                         command:(const extensions::Command&)command;
 
-// To set whether the window has a tab playing audio or muted audio playing.
-- (void)setMediaState:(TabMediaState)mediaState;
+// Sets the alert state of the tab e.g. audio playing, media recording, etc.
+// See TabUtils::TabAlertState for a list of all possible alert states.
+- (void)setAlertState:(TabAlertState)alertState;
 
-// Returns current media state, determined by the media state of tabs, set by
-// UpdateMediaState.
-- (TabMediaState)mediaState;
+// Returns current alert state, determined by the alert state of tabs, set by
+// UpdateAlertState.
+- (TabAlertState)alertState;
 
 @end  // @interface BrowserWindowController