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

content/browser/media/media_internals_unittest.cc

 // Copyright (c) 2011 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/media/media_internals.h"
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "content/public/test/test_browser_thread.h"
@@ skipping 23 matching lines @@
   base::DictionaryValue* data() {
     return &internals_->data_;
   }
 
   void DeleteItem(const std::string& item) {
     internals_->DeleteItem(item);
   }
 
   void UpdateItem(const std::string& item, const std::string& property,
                   base::Value* value) {
-    internals_->UpdateItem("", item, property, value);
+    internals_->UpdateItem(std::string(), item, property, value);
   }
 
   void SendUpdate(const std::string& function, base::Value* value) {
     internals_->SendUpdate(function, value);
   }
 
  protected:
   virtual void SetUp() {
     internals_.reset(new MediaInternals());
   }
@@ skipping 70 matching lines @@
   DeleteItem("some.item");
   EXPECT_FALSE(data()->Get("some.item", &out));
   EXPECT_TRUE(data()->Get("some", &out));
 
   DeleteItem("some");
   EXPECT_FALSE(data()->Get("some.item", &out));
   EXPECT_FALSE(data()->Get("some", &out));
 }
 
 }  // namespace content