Add missing (and remove superfluous) 'explicit' from constructors.

chrome/browser/ui/cocoa/infobars/infobar_container_controller.mm

 // 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.
 
 #include "base/logging.h"
 #include "base/mac/bundle_locations.h"
 #include "base/mac/mac_util.h"
 #include "chrome/browser/api/infobars/confirm_infobar_delegate.h"
 #include "chrome/browser/api/infobars/infobar_service.h"
 #include "chrome/browser/infobars/infobar.h"
 #import "chrome/browser/ui/cocoa/animatable_view.h"
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 #import "chrome/browser/ui/cocoa/infobars/infobar_container_controller.h"
 #import "chrome/browser/ui/cocoa/infobars/infobar_controller.h"
 #import "chrome/browser/ui/cocoa/view_id_util.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 #include "skia/ext/skia_utils_mac.h"
 
 // C++ class that receives INFOBAR_ADDED and INFOBAR_REMOVED
 // notifications and proxies them back to |controller|.
 class InfoBarNotificationObserver : public content::NotificationObserver {
  public:
-  InfoBarNotificationObserver(InfoBarContainerController* controller)
+  explicit InfoBarNotificationObserver(InfoBarContainerController* controller)
       : controller_(controller) {
   }
 
  private:
   // NotificationObserver implementation
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) {
     InfoBarService* infobar_service =
         content::Source<InfoBarService>(source).ptr();
@@ skipping 232 matching lines @@
     frame.size.width = NSWidth(containerBounds);
     [view setFrame:frame];
 
     minY += NSHeight(frame) - infobars::kTipHeight;
   }
 
   [resizeDelegate_ resizeView:[self view] newHeight:[self desiredHeight]];
 }
 
 @end