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

chrome/browser/google/google_util_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 "base/command_line.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/google/google_url_tracker.h"
 #include "chrome/browser/google/google_util.h"
 #include "chrome/common/chrome_switches.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 35 matching lines @@
   EXPECT_TRUE(IsGoogleHomePageUrl("https://www.google.com/"));
   EXPECT_TRUE(IsGoogleHomePageUrl("https://www.google.com/webhp"));
   EXPECT_TRUE(IsGoogleHomePageUrl("https://www.google.com/webhp?rlz=TEST"));
   EXPECT_TRUE(IsGoogleHomePageUrl("https://www.google.com/ig"));
   EXPECT_TRUE(IsGoogleHomePageUrl("https://www.google.com/ig/foo"));
   EXPECT_TRUE(IsGoogleHomePageUrl("https://www.google.com/ig?rlz=TEST"));
   EXPECT_TRUE(IsGoogleHomePageUrl("https://www.google.com/ig/foo?rlz=TEST"));
 }
 
 TEST(GoogleUtilTest, BadHomePages) {
-  EXPECT_FALSE(IsGoogleHomePageUrl(""));
+  EXPECT_FALSE(IsGoogleHomePageUrl(std::string()));
 
   // If specified, only the "www" subdomain is OK.
   EXPECT_FALSE(IsGoogleHomePageUrl("http://maps.google.com"));
   EXPECT_FALSE(IsGoogleHomePageUrl("http://foo.google.com"));
 
   // No non-standard port numbers.
   EXPECT_FALSE(IsGoogleHomePageUrl("http://www.google.com:1234"));
   EXPECT_FALSE(IsGoogleHomePageUrl("https://www.google.com:5678"));
 
   // Invalid TLDs.
@@ skipping 163 matching lines @@
 
   // Some paths are outright invalid as searches.
   EXPECT_FALSE(IsGoogleSearchUrl(
       "http://www.google.com/notreal?q=something"));
   EXPECT_FALSE(IsGoogleSearchUrl(
       "http://www.google.com/chrome?q=something"));
   EXPECT_FALSE(IsGoogleSearchUrl(
       "http://www.google.com/search/nogood?q=something"));
   EXPECT_FALSE(IsGoogleSearchUrl(
       "http://www.google.com/webhp/nogood#q=something"));
-  EXPECT_FALSE(IsGoogleSearchUrl(""));
+  EXPECT_FALSE(IsGoogleSearchUrl(std::string()));
 
   // Case sensitive paths.
   EXPECT_FALSE(IsGoogleSearchUrl(
       "http://www.google.com/SEARCH?q=something"));
   EXPECT_FALSE(IsGoogleSearchUrl(
       "http://www.google.com/WEBHP#q=something"));
 }
 
 TEST(GoogleUtilTest, GoogleDomains) {
   // Test some good Google domains (valid TLDs).
@@ skipping 88 matching lines @@
   EXPECT_TRUE(IsGoogleDomainUrl("http://test.foo.com:1234",
                                 google_util::DISALLOW_SUBDOMAIN,
                                 google_util::DISALLOW_NON_STANDARD_PORTS));
   EXPECT_FALSE(IsGoogleDomainUrl("file://test.foo.com:1234",
                                  google_util::DISALLOW_SUBDOMAIN,
                                  google_util::DISALLOW_NON_STANDARD_PORTS));
   EXPECT_TRUE(IsGoogleDomainUrl("http://www.google.com",
                                 google_util::DISALLOW_SUBDOMAIN,
                                 google_util::DISALLOW_NON_STANDARD_PORTS));
 }