UI: Rename MediaState to AlertState

chrome/browser/ui/cocoa/browser_window_cocoa.h

Index: chrome/browser/ui/cocoa/browser_window_cocoa.h
diff --git a/chrome/browser/ui/cocoa/browser_window_cocoa.h b/chrome/browser/ui/cocoa/browser_window_cocoa.h
index a6629e2250cc45af02c610762ef1ebcb76128167..da9b2d90ef133911cb8b78a3505b7c84d200bd94 100644
--- a/chrome/browser/ui/cocoa/browser_window_cocoa.h
+++ b/chrome/browser/ui/cocoa/browser_window_cocoa.h
@@ -165,19 +165,21 @@ class BrowserWindowCocoa
   // Adds the given FindBar cocoa controller to this browser window.
   void AddFindBar(FindBarCocoaController* find_bar_cocoa_controller);
 
-  // Update window media state to show if one of the tabs within the window is
-  // playing an audio/video or even if it's playing something but it's muted.
-  void UpdateMediaState(TabMediaState media_state);
+  // Updates the window's alert state. If the new alert state is
+  // TabAlertState::AUDIO_PLAYING or TabAlertState::AUDIO_MUTING then sets
+  // the window's title to reflect that.
+  void UpdateAlertState(TabAlertState alert_state);
 
   // Returns the cocoa-world BrowserWindowController
   BrowserWindowController* cocoa_controller() { return controller_; }
 
-  // Returns window title based on the active tab title and window media state.
+  // Returns window title based on the active tab title and the window's alert
+  // state.
   NSString* WindowTitle();
 
-  // Returns current media state, determined by the media state of tabs, set by
-  // UpdateMediaState.
-  TabMediaState media_state() { return media_state_; }
+  // Returns the current alert state, determined by the alert state of tabs. Set
+  // by UpdateAlertState.
+  TabAlertState alert_state() { return alert_state_; }
 
  protected:
   void DestroyBrowser() override;
@@ -191,10 +193,10 @@ class BrowserWindowCocoa
   ui::WindowShowState initial_show_state_;
   NSInteger attention_request_id_;  // identifier from requestUserAttention
 
-  // Preserves window media state to show appropriate icon in the window title
-  // which can be audio playing, muting or none (determined by media state of
+  // Preserves window alert state to show appropriate icon in the window title
+  // which can be audio playing, muting or none (determined by alert state of
   // tabs.
-  TabMediaState media_state_;
+  TabAlertState alert_state_;
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_BROWSER_WINDOW_COCOA_H_