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

chrome/browser/extensions/api/web_request/web_request_api_unittest.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 <map>
 #include <queue>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 556 matching lines @@
       "{\"A\":[\"test text\"],\"B\":[\"\"],\"C\":[\"test password\"]}";
   scoped_ptr<const Value> form_data(base::JSONReader::Read(kFormData));
   ASSERT_TRUE(form_data.get() != NULL);
   ASSERT_TRUE(form_data->GetType() == Value::TYPE_DICTIONARY);
   // Contents of raw.
   ListValue raw;
   extensions::subtle::AppendKeyValuePair(
       keys::kRequestBodyRawBytesKey,
       BinaryValue::CreateWithCopiedBuffer(kPlainBlock1, kPlainBlock1Length),
       &raw);
-  extensions::subtle::AppendKeyValuePair(keys::kRequestBodyRawFileKey,
-                                         Value::CreateStringValue(""),
-                                         &raw);
+  extensions::subtle::AppendKeyValuePair(
+      keys::kRequestBodyRawFileKey,
+      Value::CreateStringValue(std::string()),
+      &raw);
   extensions::subtle::AppendKeyValuePair(
       keys::kRequestBodyRawBytesKey,
       BinaryValue::CreateWithCopiedBuffer(kPlainBlock2, kPlainBlock2Length),
       &raw);
   // Summary.
   const Value* const kExpected[] = {
     form_data.get(),
     NULL,
     &raw,
     &raw,
@@ skipping 365 matching lines @@
                        int expected_extra_info_spec) {
   int actual_info_spec;
   bool actual_return_code = GenerateInfoSpec(values, &actual_info_spec);
   EXPECT_EQ(expected_return_code, actual_return_code);
   if (expected_return_code)
     EXPECT_EQ(expected_extra_info_spec, actual_info_spec);
 }
 
 }
 TEST_F(ExtensionWebRequestTest, InitFromValue) {
-  TestInitFromValue("", true, 0);
+  TestInitFromValue(std::string(), true, 0);
 
   // Single valid values.
   TestInitFromValue(
       "requestHeaders",
       true,
       ExtensionWebRequestEventRouter::ExtraInfoSpec::REQUEST_HEADERS);
   TestInitFromValue(
       "responseHeaders",
       true,
       ExtensionWebRequestEventRouter::ExtraInfoSpec::RESPONSE_HEADERS);
@@ skipping 1149 matching lines @@
   EXPECT_TRUE(credentials_set);
   EXPECT_FALSE(auth3.Empty());
   EXPECT_EQ(username, auth1.username());
   EXPECT_EQ(password, auth1.password());
   EXPECT_EQ(1u, warning_set.size());
   EXPECT_TRUE(HasWarning(warning_set, "extid2"));
   EXPECT_EQ(3u, capturing_net_log.GetSize());
 }
 
 }  // namespace extensions