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

content/browser/gpu/gpu_control_list_string_info_unittest.cc

 // Copyright (c) 2013 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/gpu/gpu_control_list.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
 class StringInfoTest : public testing::Test {
  public:
   StringInfoTest() { }
   virtual ~StringInfoTest() { }
 
   typedef GpuControlList::StringInfo StringInfo;
 };
 
 TEST_F(StringInfoTest, ValidStringInfo) {
   const std::string op[] = {
     "contains",
     "beginwith",
     "endwith",
     "="
   };
   for (size_t i = 0; i < arraysize(op); ++i) {
     {
-      StringInfo info(op[i], "");
+      StringInfo info(op[i], std::string());
       EXPECT_TRUE(info.IsValid());
     }
     {
       StringInfo info(op[i], "hello");
       EXPECT_TRUE(info.IsValid());
     }
   }
 }
 
 TEST_F(StringInfoTest, InvalidStringInfo) {
@@ skipping 51 matching lines @@
     EXPECT_TRUE(info.Contains("HAPPY"));
     EXPECT_FALSE(info.Contains("ha-ppy"));
     EXPECT_FALSE(info.Contains("ha ppy"));
     EXPECT_FALSE(info.Contains(" happy"));
     EXPECT_FALSE(info.Contains("happy "));
   }
 }
 
 }  // namespace content