Cleanup extensions code that is no longer needed after disabling extensions on Android.

BUG=349436

Review URL: https://codereview.chromium.org/456503002

Cr-Commit-Position: refs/heads/master@{#288550}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288550 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/chrome_extension_host_delegate.cc b/chrome/browser/extensions/chrome_extension_host_delegate.cc
index 57de1403..2b23d823 100644
--- a/chrome/browser/extensions/chrome_extension_host_delegate.cc
+++ b/chrome/browser/extensions/chrome_extension_host_delegate.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/extensions/chrome_extension_host_delegate.h"
 
+#include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/media/media_capture_devices_dispatcher.h"
@@ -12,11 +13,6 @@
 #include "extensions/browser/extension_host.h"
 #include "extensions/browser/extension_system.h"
 
-// TODO(thestig): Remove #ifdefs when extensions is disabled on mobile.
-#if defined(ENABLE_EXTENSIONS)
-#include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
-#endif
-
 namespace extensions {
 
 ChromeExtensionHostDelegate::ChromeExtensionHostDelegate() {}
@@ -25,9 +21,7 @@
 
 void ChromeExtensionHostDelegate::OnExtensionHostCreated(
     content::WebContents* web_contents) {
-#if defined(ENABLE_EXTENSIONS)
   ChromeExtensionWebContentsObserver::CreateForWebContents(web_contents);
-#endif
   PrefsTabHelper::CreateForWebContents(web_contents);
 }