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

chrome/test/chromedriver/chrome/devtools_http_client_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 <string>
 
 #include "base/compiler_specific.h"
 #include "base/values.h"
 #include "chrome/test/chromedriver/chrome/devtools_http_client.h"
 #include "chrome/test/chromedriver/chrome/status.h"
@@ skipping 46 matching lines @@
 }
 
 TEST(ParseWebViewsInfo, WithoutDebuggerUrl) {
   WebViewsInfo views_info;
   Status status = internal::ParseWebViewsInfo(
       "[{\"type\": \"page\", \"id\": \"1\", \"url\": \"http://page1\"}]",
       &views_info);
   ASSERT_TRUE(status.IsOk());
   ASSERT_EQ(1u, views_info.GetSize());
   ExpectEqual(
-      WebViewInfo(
-          "1", "", "http://page1", WebViewInfo::kPage),
+      WebViewInfo("1", std::string(), "http://page1", WebViewInfo::kPage),
       views_info.Get(0));
 }
 
 namespace {
 
 void AssertFails(const std::string& data) {
   WebViewsInfo views_info;
   Status status = internal::ParseWebViewsInfo(data, &views_info);
   ASSERT_FALSE(status.IsOk());
   ASSERT_EQ(0u, views_info.GetSize());
@@ skipping 68 matching lines @@
   AssertVersionFails("{}");
 }
 
 TEST(ParseVersionInfo, Valid) {
   std::string version;
   Status status = internal::ParseVersionInfo("{\"Browser\": \"1\"}", &version);
   ASSERT_TRUE(status.IsOk());
   ASSERT_EQ("1", version);
 }