Mac: Fix accidental changes to fullscreen logic from refactor.

chrome/browser/ui/cocoa/browser_window_cocoa.mm

Index: chrome/browser/ui/cocoa/browser_window_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_cocoa.mm b/chrome/browser/ui/cocoa/browser_window_cocoa.mm
index 73704d8969dbe778fc254d5e1cc010c9e97c2f0a..440d51345869d492669b02ff67d3ff3b798f752b 100644
--- a/chrome/browser/ui/cocoa/browser_window_cocoa.mm
+++ b/chrome/browser/ui/cocoa/browser_window_cocoa.mm
@@ -43,6 +43,7 @@
 #import "chrome/browser/ui/cocoa/toolbar/toolbar_controller.h"
 #import "chrome/browser/ui/cocoa/web_dialog_window_controller.h"
 #import "chrome/browser/ui/cocoa/website_settings/website_settings_bubble_controller.h"
+#include "chrome/browser/ui/fullscreen/fullscreen_controller.h"
 #include "chrome/browser/ui/search/search_model.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/web_applications/web_app.h"
@@ -350,9 +351,20 @@ void BrowserWindowCocoa::Restore() {
     [window() deminiaturize:controller_];
 }
 
-void BrowserWindowCocoa::EnterFullscreen(
-      const GURL& url, FullscreenExitBubbleType bubble_type) {
-  [controller_ enterHTML5FullscreenForURL:url bubbleType:bubble_type];
+// See browser_window_controller.h for a detailed explanation of the logic in
+// this method.
+void BrowserWindowCocoa::EnterFullscreen(const GURL& url,
+                                         FullscreenExitBubbleType bubble_type) {
+  if (browser_->fullscreen_controller()->IsWindowFullscreenForTabOrPending()) {
+    [controller_ enterWebContentFullscreenForURL:url bubbleType:bubble_type];
+    return;
+  }
+
+  if (url.is_empty()) {
+    [controller_ enterPresentationMode];
+  } else {
+    [controller_ enterExtensionFullscreenForURL:url bubbleType:bubble_type];
+  }
 }
 
 void BrowserWindowCocoa::ExitFullscreen() {