Remove the deprecated function ExtensionService::extensions().

chrome/browser/apps/app_shim/app_shim_quit_interactive_uitest_mac.mm

 // Copyright 2013 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.
 
 // Tests behavior when quitting apps with app shims.
 
 #import <Cocoa/Cocoa.h>
 #include <vector>
 
 #include "apps/switches.h"
@@ skipping 52 matching lines @@
     ASSERT_TRUE(launched_listener.WaitUntilSatisfied());
     ASSERT_EQ(1u, [[NSApp windows] count]);
 
     handler_ = g_browser_process->platform_part()->app_shim_host_manager()->
         extension_app_shim_handler();
 
     // Attach a host for the app.
     extensions::ExtensionRegistry* registry =
         extensions::ExtensionRegistry::Get(profile());
     extension_id_ =
-        GetExtensionByPath(&registry->enabled_extensions(), app_path_)->id();
+        GetExtensionByPath(registry->enabled_extensions(), app_path_)->id();
     host_.reset(new FakeHost(profile()->GetPath().BaseName(),
                              extension_id_,
                              handler_));
     handler_->OnShimLaunch(host_.get(),
                            APP_SHIM_LAUNCH_REGISTER_ONLY,
                            std::vector<base::FilePath>());
     EXPECT_EQ(host_.get(), handler_->FindHost(profile(), extension_id_));
 
     // Focus the app window.
     NSWindow* window = [[NSApp windows] objectAtIndex:0];
@@ skipping 35 matching lines @@
             atStart:NO];
 
   // This will time out if the event above does not terminate Chrome.
   content::RunMessageLoop();
 
   EXPECT_FALSE(handler_->FindHost(profile(), extension_id_));
   EXPECT_TRUE(browser_shutdown::IsTryingToQuit());
 }
 
 }  // namespace apps