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

chrome/browser/ui/webui/feedback_ui.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 "chrome/browser/ui/webui/feedback_ui.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/base64.h"
@@ skipping 391 matching lines @@
   int index = -1;
 
   std::vector<std::string> params;
   std::string custom_page_url;
   if (Tokenize(query, std::string("&"), &params)) {
     for (std::vector<std::string>::iterator it = params.begin();
          it != params.end(); ++it) {
       std::string query_str = *it;
       if (StartsWithASCII(query_str, std::string(kSessionIDParameter), true)) {
         ReplaceFirstSubstringAfterOffset(
-            &query_str, 0, kSessionIDParameter, "");
+            &query_str, 0, kSessionIDParameter, std::string());
         if (!base::StringToInt(query_str, &session_id))
           return false;
       } else if (StartsWithASCII(*it, std::string(kTabIndexParameter), true)) {
         ReplaceFirstSubstringAfterOffset(
-            &query_str, 0, kTabIndexParameter, "");
+            &query_str, 0, kTabIndexParameter, std::string());
         if (!base::StringToInt(query_str, &index))
           return false;
       } else if (StartsWithASCII(*it, std::string(kCustomPageUrlParameter),
                                  true)) {
         ReplaceFirstSubstringAfterOffset(
-            &query_str, 0, kCustomPageUrlParameter, "");
+            &query_str, 0, kCustomPageUrlParameter, std::string());
         custom_page_url = query_str;
       } else if (StartsWithASCII(*it, std::string(kCategoryTagParameter),
                                  true)) {
         ReplaceFirstSubstringAfterOffset(
-            &query_str, 0, kCategoryTagParameter, "");
+            &query_str, 0, kCategoryTagParameter, std::string());
         category_tag_ = query_str;
 #if defined(OS_CHROMEOS)
       } else if (StartsWithASCII(*it, std::string(kTimestampParameter), true)) {
         ReplaceFirstSubstringAfterOffset(
             &query_str, 0, kTimestampParameter, "");
         timestamp_ = query_str;
 #endif
       }
     }
   }
@@ skipping 281 matching lines @@
                     screenshot_filepaths.begin() + sort_size,
                     screenshot_filepaths.end(),
                     ScreenshotTimestampComp);
   for (size_t i = 0; i < sort_size; ++i)
     saved_screenshots->push_back(
         std::string(ScreenshotSource::kScreenshotUrlRoot) +
         std::string(ScreenshotSource::kScreenshotSaved) +
         screenshot_filepaths[i]);
 }
 #endif