Change WebContentsDelegate::RunFileChooser to be frame based.

chrome/browser/ui/apps/chrome_app_delegate.h

 // Copyright 2014 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_UI_APPS_CHROME_APP_DELEGATE_H_
 #define CHROME_BROWSER_UI_APPS_CHROME_APP_DELEGATE_H_
 
 #include <memory>
 
 #include "base/callback.h"
@@ skipping 33 matching lines @@
       content::WebContents* source,
       const content::OpenURLParams& params) override;
   void AddNewContents(content::BrowserContext* context,
                       content::WebContents* new_contents,
                       WindowOpenDisposition disposition,
                       const gfx::Rect& initial_rect,
                       bool user_gesture,
                       bool* was_blocked) override;
   content::ColorChooser* ShowColorChooser(content::WebContents* web_contents,
                                           SkColor initial_color) override;
-  void RunFileChooser(content::WebContents* tab,
+  void RunFileChooser(content::RenderFrameHost* render_frame_host,
                       const content::FileChooserParams& params) override;
   void RequestMediaAccessPermission(
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback,
       const extensions::Extension* extension) override;
   bool CheckMediaAccessPermission(
       content::WebContents* web_contents,
       const GURL& security_origin,
       content::MediaStreamType type,
@@ skipping 16 matching lines @@
   std::unique_ptr<ScopedKeepAlive> keep_alive_;
   std::unique_ptr<NewWindowContentsDelegate> new_window_contents_delegate_;
   base::Closure terminating_callback_;
   content::NotificationRegistrar registrar_;
   base::WeakPtrFactory<ChromeAppDelegate> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeAppDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_APPS_CHROME_APP_DELEGATE_H_