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

chrome/common/extensions/extension_icon_set_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 "chrome/common/extensions/extension_icon_set.h"
 
 #include "chrome/common/extensions/extension_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
@@ skipping 44 matching lines @@
 TEST(ExtensionIconSet, Values) {
   ExtensionIconSet icons;
   EXPECT_FALSE(icons.ContainsPath("foo"));
 
   icons.Add(extension_misc::EXTENSION_ICON_BITTY, "foo");
   icons.Add(extension_misc::EXTENSION_ICON_GIGANTOR, "bar");
 
   EXPECT_TRUE(icons.ContainsPath("foo"));
   EXPECT_TRUE(icons.ContainsPath("bar"));
   EXPECT_FALSE(icons.ContainsPath("baz"));
-  EXPECT_FALSE(icons.ContainsPath(""));
+  EXPECT_FALSE(icons.ContainsPath(std::string()));
 
   icons.Clear();
   EXPECT_FALSE(icons.ContainsPath("foo"));
 }
 
 TEST(ExtensionIconSet, FindSize) {
   ExtensionIconSet icons;
   EXPECT_EQ(extension_misc::EXTENSION_ICON_INVALID,
             icons.GetIconSizeFromPath("foo"));
 
   icons.Add(extension_misc::EXTENSION_ICON_BITTY, "foo");
   icons.Add(extension_misc::EXTENSION_ICON_GIGANTOR, "bar");
 
   EXPECT_EQ(extension_misc::EXTENSION_ICON_BITTY,
             icons.GetIconSizeFromPath("foo"));
   EXPECT_EQ(extension_misc::EXTENSION_ICON_GIGANTOR,
             icons.GetIconSizeFromPath("bar"));
   EXPECT_EQ(extension_misc::EXTENSION_ICON_INVALID,
             icons.GetIconSizeFromPath("baz"));
   EXPECT_EQ(extension_misc::EXTENSION_ICON_INVALID,
-            icons.GetIconSizeFromPath(""));
+            icons.GetIconSizeFromPath(std::string()));
 
   icons.Clear();
   EXPECT_EQ(extension_misc::EXTENSION_ICON_INVALID,
             icons.GetIconSizeFromPath("foo"));
 }
 
 }  // namespace