Split infobar_delegate.[cc,h] into separate pieces for the different classes defined within, so that

chrome/browser/ui/cocoa/extensions/extension_installed_bubble_bridge.mm

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/i18n/rtl.h"
-#include "chrome/browser/tab_contents/infobar_delegate.h"
-#import "chrome/browser/ui/cocoa/extensions/extension_installed_bubble_controller.h"
+#include "chrome/browser/tab_contents/confirm_infobar_delegate.h"
+#include "chrome/browser/tab_contents/simple_alert_infobar_delegate.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_dialogs.h"
+#import "chrome/browser/ui/cocoa/extensions/extension_installed_bubble_controller.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_action.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 // When an extension is installed on Mac with neither browser action nor
 // page action icons, show an infobar instead of a popup bubble.
 static void ShowGenericExtensionInstalledInfoBar(
     const Extension* new_extension,
     SkBitmap icon,
@@ skipping 37 matching lines @@
                         icon:icon];
   } else {
     // If the extension is of type GENERIC, meaning it doesn't have a UI
     // surface to display for this window, launch infobar instead of popup
     // bubble, because we have no guaranteed wrench menu button to point to.
     ShowGenericExtensionInstalledInfoBar(extension, icon, profile);
   }
 }
 
 } // namespace browser