Introduce WindowStateDelegate::ToggleFullscreen

chrome/browser/ui/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate.cc b/chrome/browser/ui/ash/chrome_shell_delegate.cc
index c94e533de75fbb760f28026085bcb6b8e69f71a8..0b7ae4f9a7d79e1a26ebf2e8bfaf2c7d99fc5a09 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate.cc
@@ -166,26 +166,7 @@ void ChromeShellDelegate::ToggleFullscreen() {
 
   Browser* browser = chrome::FindBrowserWithWindow(window);
   if (browser) {
-    // If a window is fullscreen, exit fullscreen.
-    if (is_fullscreen) {
-      chrome::ToggleFullscreenMode(browser);
-      return;
-    }
-
-    // AppNonClientFrameViewAsh shows only the window controls and no other
-    // window decorations which is pretty close to fullscreen. Put v1 apps
-    // into maximized mode instead of fullscreen to avoid showing the ugly
-    // fullscreen exit bubble.
-#if defined(OS_WIN)
-    if (browser->host_desktop_type() == chrome::HOST_DESKTOP_TYPE_NATIVE) {
-      chrome::ToggleFullscreenMode(browser);
-      return;
-    }
-#endif  // OS_WIN
-    if (browser->is_app() && browser->app_type() != Browser::APP_TYPE_CHILD)
-      window_state->ToggleMaximized();
-    else
-      chrome::ToggleFullscreenMode(browser);
+    chrome::ToggleFullscreenMode(browser);
     return;
   }