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

chrome/renderer/safe_browsing/malware_dom_details_browsertest.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 "base/stringprintf.h"
 #include "chrome/common/safe_browsing/safebrowsing_messages.h"
 #include "chrome/renderer/safe_browsing/malware_dom_details.h"
 #include "chrome/test/base/chrome_render_view_test.h"
 #include "net/base/escape.h"
 
@@ skipping 79 matching lines @@
     EXPECT_EQ(GURL(), params[3].parent);
     EXPECT_EQ(1u, params[3].children.size());
     EXPECT_EQ(iframe2_url, params[3].children[0]);
 
     EXPECT_EQ(iframe2_url, params[4].url);
     EXPECT_EQ(GURL(), params[4].parent);
     EXPECT_EQ(0u, params[4].children.size());
   }
 
   { // >50 subframes, to verify kMaxNodes.
-    std::string html = "";
+    std::string html;
     for (int i = 0; i < 55; ++i) {
       // The iframe contents is just a number.
       GURL iframe_url(base::StringPrintf("%s%d", urlprefix, i));
       html += "<iframe src=\"" + net::EscapeForHTML(iframe_url.spec()) +
           "\"></iframe>";
     }
     GURL url(urlprefix + html);
 
     LoadHTML(html.c_str());
     std::vector<SafeBrowsingHostMsg_MalwareDOMDetails_Node> params;
     details->ExtractResources(&params);
     ASSERT_EQ(51u, params.size());
   }
 
   { // A page with >50 scripts, to verify kMaxNodes.
-    std::string html = "";
+    std::string html;
     for (int i = 0; i < 55; ++i) {
       // The iframe contents is just a number.
       GURL script_url(base::StringPrintf("%s%d", urlprefix, i));
       html += "<script src=\"" + net::EscapeForHTML(script_url.spec()) +
           "\"></script>";
     }
     GURL url(urlprefix + html);
 
     LoadHTML(html.c_str());
     std::vector<SafeBrowsingHostMsg_MalwareDOMDetails_Node> params;
     details->ExtractResources(&params);
     ASSERT_EQ(51u, params.size());
   }
 
 }