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

ppapi/tests/test_url_loader.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 "ppapi/tests/test_url_loader.h"
 
 #include <stdio.h>
 #include <string.h>
 #include <string>
 
@@ skipping 357 matching lines @@
   std::string postdata2("data");
   request.AppendDataToBody(postdata2.data(), postdata2.length());
   return LoadAndCompareBody(request, postdata1 + postdata2);
 }
 
 std::string TestURLLoader::TestEmptyDataPOST() {
   pp::URLRequestInfo request(instance_);
   request.SetURL("/echo");
   request.SetMethod("POST");
   request.AppendDataToBody("", 0);
-  return LoadAndCompareBody(request, "");
+  return LoadAndCompareBody(request, std::string());
 }
 
 std::string TestURLLoader::TestBinaryDataPOST() {
   pp::URLRequestInfo request(instance_);
   request.SetURL("/echo");
   request.SetMethod("POST");
   const char postdata_chars[] =
       "\x00\x01\x02\x03\x04\x05postdata\xfa\xfb\xfc\xfd\xfe\xff";
   std::string postdata(postdata_chars,
                        sizeof(postdata_chars) / sizeof(postdata_chars[0]));
@@ skipping 162 matching lines @@
 
   PASS();
 }
 
 std::string TestURLLoader::TestUntrustedHttpRequests() {
   // HTTP methods are restricted only for untrusted loaders. Forbidden
   // methods are CONNECT, TRACE, and TRACK, and any string that is not a
   // valid token (containing special characters like CR, LF).
   // http://www.w3.org/TR/XMLHttpRequest/
   {
-    ASSERT_EQ(OpenUntrusted("cOnNeCt", ""), PP_ERROR_NOACCESS);
-    ASSERT_EQ(OpenUntrusted("tRaCk", ""), PP_ERROR_NOACCESS);
-    ASSERT_EQ(OpenUntrusted("tRaCe", ""), PP_ERROR_NOACCESS);
-    ASSERT_EQ(OpenUntrusted("POST\x0d\x0ax-csrf-token:\x20test1234", ""),
-                            PP_ERROR_NOACCESS);
+    ASSERT_EQ(OpenUntrusted("cOnNeCt", std::string()), PP_ERROR_NOACCESS);
+    ASSERT_EQ(OpenUntrusted("tRaCk", std::string()), PP_ERROR_NOACCESS);
+    ASSERT_EQ(OpenUntrusted("tRaCe", std::string()), PP_ERROR_NOACCESS);
+    ASSERT_EQ(
+        OpenUntrusted("POST\x0d\x0ax-csrf-token:\x20test1234", std::string()),
+        PP_ERROR_NOACCESS);
   }
   // HTTP methods are restricted only for untrusted loaders. Try all headers
   // that are forbidden by http://www.w3.org/TR/XMLHttpRequest/.
   {
     ASSERT_EQ(OpenUntrusted("GET", "Accept-Charset:\n"), PP_ERROR_NOACCESS);
     ASSERT_EQ(OpenUntrusted("GET", "Accept-Encoding:\n"), PP_ERROR_NOACCESS);
     ASSERT_EQ(OpenUntrusted("GET", "Connection:\n"), PP_ERROR_NOACCESS);
     ASSERT_EQ(OpenUntrusted("GET", "Content-Length:\n"), PP_ERROR_NOACCESS);
     ASSERT_EQ(OpenUntrusted("GET", "Cookie:\n"), PP_ERROR_NOACCESS);
     ASSERT_EQ(OpenUntrusted("GET", "Cookie2:\n"), PP_ERROR_NOACCESS);
@@ skipping 36 matching lines @@
       return ReportError(
           "Untrusted request with content-transfer-encoding restriction", rv);
   }
 
   PASS();
 }
 
 std::string TestURLLoader::TestTrustedHttpRequests() {
   // Trusted requests can use restricted methods.
   {
-    ASSERT_EQ(OpenTrusted("cOnNeCt", ""), PP_OK);
-    ASSERT_EQ(OpenTrusted("tRaCk", ""), PP_OK);
-    ASSERT_EQ(OpenTrusted("tRaCe", ""), PP_OK);
+    ASSERT_EQ(OpenTrusted("cOnNeCt", std::string()), PP_OK);
+    ASSERT_EQ(OpenTrusted("tRaCk", std::string()), PP_OK);
+    ASSERT_EQ(OpenTrusted("tRaCe", std::string()), PP_OK);
   }
   // Trusted requests can use restricted headers.
   {
     ASSERT_EQ(OpenTrusted("GET", "Accept-Charset:\n"), PP_OK);
     ASSERT_EQ(OpenTrusted("GET", "Accept-Encoding:\n"), PP_OK);
     ASSERT_EQ(OpenTrusted("GET", "Connection:\n"), PP_OK);
     ASSERT_EQ(OpenTrusted("GET", "Content-Length:\n"), PP_OK);
     ASSERT_EQ(OpenTrusted("GET", "Cookie:\n"), PP_OK);
     ASSERT_EQ(OpenTrusted("GET", "Cookie2:\n"), PP_OK);
     ASSERT_EQ(OpenTrusted(
@@ skipping 203 matching lines @@
   if (rv != PP_ERROR_FAILED) {
     return ReportError("The lower buffer value was higher than the upper but "
                        "the URLLoader did not fail.", rv);
   }
 
   PASS();
 }
 
 // TODO(viettrungluu): Add tests for  Get{Upload,Download}Progress, Close
 // (including abort tests if applicable).