[cros login] Cleanup: replace some of Profile usages with BrowserContext.

chrome/browser/chromeos/login/ui/proxy_settings_dialog.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_CHROMEOS_LOGIN_UI_PROXY_SETTINGS_DIALOG_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_UI_PROXY_SETTINGS_DIALOG_H_
 
 #include "chrome/browser/chromeos/login/ui/login_web_dialog.h"
 #include "ui/gfx/native_widget_types.h"
 
-class Profile;
+namespace content {
+class BrowserContext;
+}
 
 namespace chromeos {
 
 class NetworkState;
 
 // Should be used on the UI thread only, because of static |instance_count_|.
 class ProxySettingsDialog : public LoginWebDialog {
  public:
   // Returns whether the dialog is being shown.
   static bool IsShown();
 
-  ProxySettingsDialog(Profile* profile,
+  ProxySettingsDialog(content::BrowserContext* browser_context,
                       const NetworkState& network,
                       LoginWebDialog::Delegate* delegate,
                       gfx::NativeWindow window);
   virtual ~ProxySettingsDialog();
 
  protected:
   // ui::WebDialogDelegate implementation.
   virtual void OnDialogClosed(const std::string& json_retval) OVERRIDE;
 
  private:
   // TODO(altimofeev): consider avoidance static variable by extending current
   // WebUI/login interfaces.
   static int instance_count_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxySettingsDialog);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_UI_PROXY_SETTINGS_DIALOG_H_