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

content/browser/accessibility/cross_platform_accessibility_browsertest.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 <string>
 #include <vector>
 
 #include "base/utf_string_conversions.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/public/browser/notification_service.h"
@@ skipping 89 matching lines @@
 // Convenience method to get the value of a particular AccessibilityNodeData
 // node attribute as a UTF-8 const char*.
 std::string CrossPlatformAccessibilityBrowserTest::GetAttr(
     const AccessibilityNodeData& node,
     const AccessibilityNodeData::StringAttribute attr) {
   std::map<AccessibilityNodeData::StringAttribute, string16>::const_iterator
       iter = node.string_attributes.find(attr);
   if (iter != node.string_attributes.end())
     return UTF16ToUTF8(iter->second);
   else
-    return "";
+    return std::string();
 }
 
 // Convenience method to get the value of a particular AccessibilityNodeData
 // node integer attribute.
 int CrossPlatformAccessibilityBrowserTest::GetIntAttr(
     const AccessibilityNodeData& node,
     const AccessibilityNodeData::IntAttribute attr) {
   std::map<AccessibilityNodeData::IntAttribute, int32>::const_iterator iter =
       node.int_attributes.find(attr);
   if (iter != node.int_attributes.end())
@@ skipping 344 matching lines @@
   const AccessibilityNodeDataTreeNode& tree = GetAccessibilityNodeDataTree();
 
   ASSERT_EQ(1U, tree.children.size());
   const AccessibilityNodeDataTreeNode& textbox = tree.children[0];
 
   EXPECT_EQ(
       true, GetBoolAttr(textbox, AccessibilityNodeData::ATTR_CAN_SET_VALUE));
 }
 
 }  // namespace content