Enable immersive fullscreen on Windows Ash.

chrome/browser/ui/views/frame/browser_frame_ash.cc

Index: chrome/browser/ui/views/frame/browser_frame_ash.cc
diff --git a/chrome/browser/ui/views/frame/browser_frame_ash.cc b/chrome/browser/ui/views/frame/browser_frame_ash.cc
index 10fa058804272ffeea3cd14f546421a293512336..6d724c66176715ff1bf8c4933a24a4cda92528df 100644
--- a/chrome/browser/ui/views/frame/browser_frame_ash.cc
+++ b/chrome/browser/ui/views/frame/browser_frame_ash.cc
@@ -69,7 +69,6 @@ BrowserFrameAsh::BrowserFrameAsh(BrowserFrame* browser_frame,
   // This way the requested bounds are honored.
   if (!browser->bounds_overridden() && !browser->is_session_restore())
     SetWindowAutoManaged();
-#if defined(OS_CHROMEOS)
   if (browser->is_type_tabbed()) {
     // Animating to immersive fullscreen does not look good. Immersive
     // fullscreen is the default fullscreen type on ChromeOS for tabbed browser
@@ -79,6 +78,7 @@ BrowserFrameAsh::BrowserFrameAsh(BrowserFrame* browser_frame,
     window_state->set_animate_to_fullscreen(false);
   }
 
+#if defined(OS_CHROMEOS)
   // For legacy reasons v1 apps (like Secure Shell) are allowed to consume keys
   // like brightness, volume, etc. Otherwise these keys are handled by the
   // Ash window manager.