Coverity: Pass parameters by reference.

chrome/browser/accessibility_events.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_ACCESSIBILITY_EVENTS_H_
 #define CHROME_BROWSER_ACCESSIBILITY_EVENTS_H_
 #pragma once
 
 #include <string>
 
@@ skipping 175 matching lines @@
 class AccessibilityTextBoxInfo : public AccessibilityControlInfo {
  public:
   AccessibilityTextBoxInfo(Profile* profile,
                            const std::string& name,
                            bool password);
 
   virtual const char* type() const;
 
   virtual void SerializeToDict(DictionaryValue* dict) const;
 
-  void SetValue(std::string value, int selection_start, int selection_end) {
+  void SetValue(
+      const std::string& value, int selection_start, int selection_end) {
     value_ = value;
     selection_start_ = selection_start;
     selection_end_ = selection_end;
   }
 
   const std::string& value() const { return value_; }
   bool password() const { return password_; }
   int selection_start() const { return selection_start_; }
   int selection_end() const { return selection_end_; }
 
@@ skipping 64 matching lines @@
   bool has_submenu() const { return has_submenu_; }
 
  private:
   bool has_submenu_;
   // The 0-based index of the current item and the number of total items.
   int item_index_;
   int item_count_;
 };
 
 #endif  // CHROME_BROWSER_ACCESSIBILITY_EVENTS_H_