extensions: Add ExtensionView interface.

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

 // 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.
 
 #import "chrome/browser/ui/cocoa/infobars/extension_infobar_controller.h"
 
 #include <cmath>
 
 #include "chrome/browser/api/infobars/infobar_service.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_infobar_delegate.h"
+#include "chrome/browser/extensions/extension_view.h"
 #include "chrome/browser/extensions/image_loading_tracker.h"
 #include "chrome/browser/ui/browser_finder.h"
 #import "chrome/browser/ui/cocoa/animatable_view.h"
 #import "chrome/browser/ui/cocoa/extensions/extension_action_context_menu.h"
 #include "chrome/browser/ui/cocoa/infobars/infobar.h"
 #import "chrome/browser/ui/cocoa/menu_button.h"
 #include "chrome/browser/ui/tab_contents/tab_contents.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_icon_set.h"
@@ skipping 148 matching lines @@
 
 - (void)dealloc {
   [[NSNotificationCenter defaultCenter] removeObserver:self];
   [super dealloc];
 }
 
 - (void)addAdditionalControls {
   [self removeButtons];
 
   extensionView_ = delegate_->AsExtensionInfoBarDelegate()->extension_host()->
-      view()->native_view();
+      GetExtensionView()->GetNativeView();
 
   // Add the extension's RenderWidgetHostView to the view hierarchy of the
   // InfoBar and make sure to place it below the Close button.
   [infoBarView_ addSubview:extensionView_
                 positioned:NSWindowBelow
                 relativeTo:(NSView*)closeButton_];
 
   // Add the context menu button to the hierarchy.
   [dropdownButton_ setShowsBorderOnlyWhileMouseInside:YES];
   CGFloat buttonY =
@@ skipping 83 matching lines @@
 
 InfoBar* ExtensionInfoBarDelegate::CreateInfoBar(InfoBarService* owner) {
   NSWindow* window =
       [(NSView*)owner->GetWebContents()->GetContentNativeView() window];
   ExtensionInfoBarController* controller =
       [[ExtensionInfoBarController alloc] initWithDelegate:this
                                                      owner:owner
                                                     window:window];
   return new InfoBar(controller, this);
 }