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

chrome/browser/chromeos/login/ui/proxy_settings_dialog.h

Index: chrome/browser/chromeos/login/ui/proxy_settings_dialog.h
diff --git a/chrome/browser/chromeos/login/ui/proxy_settings_dialog.h b/chrome/browser/chromeos/login/ui/proxy_settings_dialog.h
index d61add14f8e97d22b564240c1f693b944adde470..1c1b90081558ecaec3b1ed6068182c536b3d0436 100644
--- a/chrome/browser/chromeos/login/ui/proxy_settings_dialog.h
+++ b/chrome/browser/chromeos/login/ui/proxy_settings_dialog.h
@@ -8,7 +8,9 @@
 #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 {
 
@@ -20,7 +22,7 @@ class ProxySettingsDialog : public LoginWebDialog {
   // 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);