Only build extensions code in chrome/browser/ui when extensions are enabled.

chrome/browser/profiles/off_the_record_profile_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/profiles/off_the_record_profile_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
@@ skipping 120 matching lines @@
   // TODO(oshima): Remove the need to eagerly initialize the request context
   // getter. chromeos::OnlineAttempt is illegally trying to access this
   // Profile member from a thread other than the UI thread, so we need to
   // prevent a race.
 #if defined(OS_CHROMEOS)
   GetRequestContext();
 #endif  // defined(OS_CHROMEOS)
 
   InitHostZoomMap();
 
-  // Make the chrome//extension-icon/ resource available.
-  extensions::ExtensionIconSource* icon_source =
-      new extensions::ExtensionIconSource(profile_);
-  content::URLDataSource::Add(this, icon_source);
-
 #if defined(ENABLE_PLUGINS)
   ChromePluginServiceFilter::GetInstance()->RegisterResourceContext(
       PluginPrefs::GetForProfile(this).get(),
       io_data_->GetResourceContextNoInit());
 #endif
 
 #if defined(ENABLE_EXTENSIONS)
+  // Make the chrome//extension-icon/ resource available.
+  extensions::ExtensionIconSource* icon_source =
+      new extensions::ExtensionIconSource(profile_);
+  content::URLDataSource::Add(this, icon_source);
+
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&NotifyOTRProfileCreatedOnIOThread, profile_, this));
 #endif
 }
 
 OffTheRecordProfileImpl::~OffTheRecordProfileImpl() {
   MaybeSendDestroyedNotification();
 
 #if defined(ENABLE_PLUGINS)
@@ skipping 361 matching lines @@
 PrefProxyConfigTracker* OffTheRecordProfileImpl::CreateProxyConfigTracker() {
 #if defined(OS_CHROMEOS)
   if (chromeos::ProfileHelper::IsSigninProfile(this)) {
     return ProxyServiceFactory::CreatePrefProxyConfigTrackerOfLocalState(
         g_browser_process->local_state());
   }
 #endif  // defined(OS_CHROMEOS)
   return ProxyServiceFactory::CreatePrefProxyConfigTrackerOfProfile(
       GetPrefs(), g_browser_process->local_state());
 }