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

content/browser/devtools/devtools_http_handler_unittest.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 "base/message_loop.h"
 #include "base/run_loop.h"
 #include "content/browser/browser_thread_impl.h"
 #include "content/public/browser/devtools_http_handler.h"
 #include "content/public/browser/devtools_http_handler_delegate.h"
 #include "net/socket/stream_listen_socket.h"
@@ skipping 38 matching lines @@
         BrowserThread::UI, FROM_HERE, quit_closure_1_);
     return new DummyListenSocket();
   }
  private:
   base::Closure quit_closure_1_;
   base::Closure quit_closure_2_;
 };
 
 class DummyDelegate : public DevToolsHttpHandlerDelegate {
  public:
-  virtual std::string GetDiscoveryPageHTML() OVERRIDE { return ""; }
+  virtual std::string GetDiscoveryPageHTML() OVERRIDE { return std::string(); }
   virtual bool BundlesFrontendResources() OVERRIDE { return true; }
   virtual base::FilePath GetDebugFrontendDir() OVERRIDE {
     return base::FilePath();
   }
   virtual std::string GetPageThumbnailData(const GURL& url) OVERRIDE {
-    return "";
+    return std::string();
   }
   virtual RenderViewHost* CreateNewTarget() OVERRIDE { return NULL; }
   virtual TargetType GetTargetType(RenderViewHost*) OVERRIDE {
     return kTargetTypeTab;
   }
   virtual std::string GetViewDescription(content::RenderViewHost*) OVERRIDE {
-    return "";
+    return std::string();
   }
 };
 
 }
 
 class DevToolsHttpHandlerTest : public testing::Test {
  public:
   DevToolsHttpHandlerTest()
       : ui_thread_(BrowserThread::UI, &message_loop_) {
   }
  protected:
   virtual void SetUp() {
     file_thread_.reset(new BrowserThreadImpl(BrowserThread::FILE));
     file_thread_->Start();
   }
   virtual void TearDown() {
     file_thread_->Stop();
   }
  private:
   MessageLoopForIO message_loop_;
   BrowserThreadImpl ui_thread_;
   scoped_ptr<BrowserThreadImpl> file_thread_;
 };
 
 TEST_F(DevToolsHttpHandlerTest, TestStartStop) {
   base::RunLoop run_loop, run_loop_2;
   content::DevToolsHttpHandler* devtools_http_handler_ =
       content::DevToolsHttpHandler::Start(
-          new DummyListenSocketFactory(
-              run_loop.QuitClosure(), run_loop_2.QuitClosure()),
-          "",
+          new DummyListenSocketFactory(run_loop.QuitClosure(),
+                                       run_loop_2.QuitClosure()),
+          std::string(),
           new DummyDelegate());
   // Our dummy socket factory will post a quit message once the server will
   // become ready.
   run_loop.Run();
   devtools_http_handler_->Stop();
   // Make sure the handler actually stops.
   run_loop_2.Run();
 }
 
 }  // namespace content