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

content/browser/storage_partition_impl_map_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 "content/browser/storage_partition_impl_map.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
 class StoragePartitionConfigTest : public testing::Test {
 };
 
 // Test that the Less comparison function is implemented properly to uniquely
 // identify storage partitions used as keys in a std::map.
 TEST_F(StoragePartitionConfigTest, OperatorLess) {
-  StoragePartitionImplMap::StoragePartitionConfig c1("", "", false);
-  StoragePartitionImplMap::StoragePartitionConfig c2("", "", false);
-  StoragePartitionImplMap::StoragePartitionConfig c3("", "", true);
-  StoragePartitionImplMap::StoragePartitionConfig c4("a", "", true);
-  StoragePartitionImplMap::StoragePartitionConfig c5("b", "", true);
-  StoragePartitionImplMap::StoragePartitionConfig c6("", "abc", false);
-  StoragePartitionImplMap::StoragePartitionConfig c7("", "abc", true);
+  StoragePartitionImplMap::StoragePartitionConfig c1(
+      std::string(), std::string(), false);
+  StoragePartitionImplMap::StoragePartitionConfig c2(
+      std::string(), std::string(), false);
+  StoragePartitionImplMap::StoragePartitionConfig c3(
+      std::string(), std::string(), true);
+  StoragePartitionImplMap::StoragePartitionConfig c4("a", std::string(), true);
+  StoragePartitionImplMap::StoragePartitionConfig c5("b", std::string(), true);
+  StoragePartitionImplMap::StoragePartitionConfig c6(
+      std::string(), "abc", false);
+  StoragePartitionImplMap::StoragePartitionConfig c7(
+      std::string(), "abc", true);
   StoragePartitionImplMap::StoragePartitionConfig c8("a", "abc", false);
   StoragePartitionImplMap::StoragePartitionConfig c9("a", "abc", true);
 
   StoragePartitionImplMap::StoragePartitionConfigLess less;
 
   // Let's ensure basic comparison works.
   EXPECT_TRUE(less(c1, c3));
   EXPECT_TRUE(less(c1, c4));
   EXPECT_TRUE(less(c3, c4));
   EXPECT_TRUE(less(c4, c5));
@@ skipping 16 matching lines @@
   EXPECT_FALSE(less(c1, c1));
 
   // Check for transitivity.
   EXPECT_TRUE(less(c1, c4));
 
   // Let's enforce that two identical elements obey strict weak ordering.
   EXPECT_TRUE(!less(c1, c2) && !less(c2, c1));
 }
 
 }  // namespace content