Remove InlineLoginHandlerChromeOS and exclude InlineLoginUI from CrOS build.

chrome/browser/ui/webui/signin/inline_login_ui.h

 // Copyright 2013 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_WEBUI_SIGNIN_INLINE_LOGIN_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_SIGNIN_INLINE_LOGIN_UI_H_
 
 #include "base/macros.h"
 #include "chrome/browser/extensions/signin/scoped_gaia_auth_extension.h"
 #include "ui/web_dialogs/web_dialog_ui.h"
 
-namespace content {
-class RenderFrameHost;
-}
-
 // Inline login WebUI in various signin flows for ChromeOS and Chrome desktop.
 // The authentication is carried out via the host gaia_auth extension. Upon
 // success, the profile of the webui should be populated with proper cookies.
 // Then this UI would fetch the oauth2 tokens using the cookies.
 class InlineLoginUI : public ui::WebDialogUI {
  public:
   explicit InlineLoginUI(content::WebUI* web_ui);
   ~InlineLoginUI() override;
 
-  // Gets the frame (iframe or webview) within an auth page that has the
-  // specified parent origin if |parent_origin| is not empty, and the specified
-  // parent frame name.
-  static content::RenderFrameHost* GetAuthFrame(
-      content::WebContents* web_contents,
-      const GURL& parent_origin,
-      const std::string& parent_frame_name);
-
-  static content::WebContents* GetAuthFrameWebContents(
-      content::WebContents* web_contents,
-      const GURL& parent_origin,
-      const std::string& parent_frame_name);
  private:
   ScopedGaiaAuthExtension auth_extension_;
 
   DISALLOW_COPY_AND_ASSIGN(InlineLoginUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SIGNIN_INLINE_LOGIN_UI_H_