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

net/spdy/spdy_write_queue_unittest.cc

 // Copyright (c) 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.
 
 #include "net/spdy/spdy_write_queue.h"
 
 #include <cstddef>
 #include <cstring>
 #include <string>
 
@@ skipping 42 matching lines @@
 int ProducerToInt(scoped_ptr<SpdyFrameProducer> producer) {
   int i = 0;
   EXPECT_TRUE(base::StringToInt(ProducerToString(producer.Pass()), &i));
   return i;
 }
 
 // Makes a SpdyStream with the given priority and a NULL SpdySession
 // -- be careful to not call any functions that expect the session to
 // be there.
 SpdyStream* MakeTestStream(RequestPriority priority) {
-  return new SpdyStream(NULL, "", priority, 0, 0, false, BoundNetLog());
+  return new SpdyStream(
+      NULL, std::string(), priority, 0, 0, false, BoundNetLog());
 }
 
 // Add some frame producers of different priority. The producers
 // should be dequeued in priority order with their associated stream.
 TEST_F(SpdyWriteQueueTest, DequeuesByPriority) {
   SpdyWriteQueue write_queue;
 
   scoped_ptr<SpdyFrameProducer> producer_low = StringToProducer("LOW");
   scoped_ptr<SpdyFrameProducer> producer_medium = StringToProducer("MEDIUM");
   scoped_ptr<SpdyFrameProducer> producer_highest = StringToProducer("HIGHEST");
@@ skipping 100 matching lines @@
   write_queue.Clear();
 
   scoped_ptr<SpdyFrameProducer> frame_producer;
   scoped_refptr<SpdyStream> stream;
   EXPECT_FALSE(write_queue.Dequeue(&frame_producer, &stream));
 }
 
 }
 
 }  // namespace net