Fix GCC build for target 'all'

chrome/browser/extensions/api/web_navigation/web_navigation_apitest.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 <list>
 #include <set>
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
@@ skipping 111 matching lines @@
   // Needs to be invoked on the IO thread.
   std::unique_ptr<content::ResourceThrottle> CreateResourceThrottle(
       const GURL& url) {
     DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
     if (urls_to_delay_.find(url) == urls_to_delay_.end())
       return NULL;
 
     auto throttle = base::MakeUnique<Throttle>();
     throttle->set_url(url);
     throttles_.push_back(throttle->AsWeakPtr());
-    return throttle;
+    return std::move(throttle);
   }
 
  private:
   friend class base::RefCountedThreadSafe<TestNavigationListener>;
 
   virtual ~TestNavigationListener() {}
 
   // Stores a throttle per URL request that we have delayed.
   class Throttle : public content::ResourceThrottle,
                    public base::SupportsWeakPtr<Throttle> {
@@ skipping 664 matching lines @@
           "extensions/api_test/webnavigation/crash/b.html",
       embedded_test_server()->port()));
   ui_test_utils::NavigateToURL(browser(), url);
 
   ASSERT_TRUE(catcher.GetNextResult()) << catcher.message();
 }
 
 #endif
 
 }  // namespace extensions