Remove explicit keyword from multi-argument constructors

chrome/browser/automation/automation_provider_observers.h

 // Copyright (c) 2011 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_AUTOMATION_AUTOMATION_PROVIDER_OBSERVERS_H_
 #define CHROME_BROWSER_AUTOMATION_AUTOMATION_PROVIDER_OBSERVERS_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 581 matching lines @@
  private:
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(DomOperationObserver);
 };
 
 // Sends a message back to the automation client with the results of the DOM
 // operation.
 class DomOperationMessageSender : public DomOperationObserver {
  public:
-  explicit DomOperationMessageSender(AutomationProvider* automation,
-                                     IPC::Message* relpy_message,
-                                     bool use_json_interface);
+  DomOperationMessageSender(AutomationProvider* automation,
+                            IPC::Message* relpy_message,
+                            bool use_json_interface);
   virtual ~DomOperationMessageSender();
 
   virtual void OnDomOperationCompleted(const std::string& json) OVERRIDE;
   virtual void OnModalDialogShown() OVERRIDE;
 
  private:
   base::WeakPtr<AutomationProvider> automation_;
   scoped_ptr<IPC::Message> reply_message_;
   bool use_json_interface_;
 
@@ skipping 970 matching lines @@
 
  private:
   NotificationRegistrar registrar_;
   base::WeakPtr<AutomationProvider> automation_;
   scoped_ptr<IPC::Message> reply_message_;
 
   DISALLOW_COPY_AND_ASSIGN(DragTargetDropAckNotificationObserver);
 };
 
 #endif  // CHROME_BROWSER_AUTOMATION_AUTOMATION_PROVIDER_OBSERVERS_H_