Remove WebAuthFlowWindow and its implementation on all platforms. We don't need it anymore since we…

chrome/browser/ui/extensions/web_auth_flow_window.cc

-// 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.
-
-#include "chrome/browser/ui/extensions/web_auth_flow_window.h"
-
-#include "content/public/browser/browser_context.h"
-
-using content::BrowserContext;
-using content::WebContents;
-
-WebAuthFlowWindow::~WebAuthFlowWindow() {
-}
-
-WebAuthFlowWindow::WebAuthFlowWindow(
-    Delegate* delegate,
-    BrowserContext* browser_context,
-    WebContents* contents)
-    : delegate_(delegate),
-      browser_context_(browser_context),
-      contents_(contents) {
-}