Android: Remove more browser extensions code, and fullscreen ui.

chrome/browser/ui/browser_navigator.cc

Index: chrome/browser/ui/browser_navigator.cc
diff --git a/chrome/browser/ui/browser_navigator.cc b/chrome/browser/ui/browser_navigator.cc
index b0961df5d6a65bb2557bdf1a4b4afba565d4d5c8..6b7c43a530fbfc13fb5a36f61e2edbf6a1beacf8 100644
--- a/chrome/browser/ui/browser_navigator.cc
+++ b/chrome/browser/ui/browser_navigator.cc
@@ -39,17 +39,21 @@
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
-#include "extensions/browser/extension_registry.h"
-#include "extensions/common/extension.h"
-#include "extensions/common/extension_set.h"
 
 #if defined(USE_ASH)
 #include "chrome/browser/ui/ash/multi_user/multi_user_window_manager.h"
 #endif
+
 #if defined(USE_AURA)
 #include "ui/aura/window.h"
 #endif
 
+#if defined(ENABLE_EXTENSIONS)
+#include "extensions/browser/extension_registry.h"
+#include "extensions/common/extension.h"
+#include "extensions/common/extension_set.h"
+#endif
+
 using content::GlobalRequestID;
 using content::NavigationController;
 using content::WebContents;
@@ -493,12 +497,14 @@ void Navigate(NavigateParams* params) {
   if (!AdjustNavigateParamsForURL(params))
     return;
 
+#if defined(ENABLE_EXTENSIONS)
   const extensions::Extension* extension =
     extensions::ExtensionRegistry::Get(params->initiating_profile)->
         enabled_extensions().GetExtensionOrAppByURL(params->url);
   // Platform apps cannot navigate. Block the request.
   if (extension && extension->is_platform_app())
     params->url = GURL(chrome::kExtensionInvalidRequestURL);
+#endif
 
   // The browser window may want to adjust the disposition.
   if (params->disposition == NEW_POPUP &&