Rewrite std::string("") to std::string(), Linux edition.

content/browser/browser_plugin/browser_plugin_guest.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 "content/browser/browser_plugin/browser_plugin_guest.h"
 
 #include <algorithm>
 
 #include "base/message_loop.h"
 #include "base/string_util.h"
@@ skipping 74 matching lines @@
     RenderViewHost* render_view_host,
     int url_request_id) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   int render_process_id = render_view_host->GetProcess()->GetID();
   GlobalRequestID global_id(render_process_id, url_request_id);
   net::URLRequest* url_request =
       ResourceDispatcherHostImpl::Get()->GetURLRequest(global_id);
   if (url_request)
     return url_request->url().possibly_invalid_spec();
-  return "";
+  return std::string();
 }
 
 }
 
 class BrowserPluginGuest::EmbedderRenderViewHostObserver
     : public RenderViewHostObserver {
  public:
   explicit EmbedderRenderViewHostObserver(BrowserPluginGuest* guest)
       : RenderViewHostObserver(
           guest->embedder_web_contents()->GetRenderViewHost()),
@@ skipping 1198 matching lines @@
                    base::Value::CreateStringValue(request_method));
   request_info.Set(browser_plugin::kURL, base::Value::CreateStringValue(url));
 
   SendMessageToEmbedder(
       new BrowserPluginMsg_RequestPermission(instance_id(),
           BrowserPluginPermissionTypeDownload, permission_request_id,
           request_info));
 }
 
 }  // namespace content