[Autofill] Add ability to load Risk fingerprint data in AutofillDialogControllerImpl.

chrome/browser/autofill/risk/fingerprint.h

 // 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.
 
 #ifndef CHROME_BROWSER_AUTOFILL_RISK_FINGERPRINT_H_
 #define CHROME_BROWSER_AUTOFILL_RISK_FINGERPRINT_H_
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/memory/scoped_ptr.h"
 
 class PrefServiceBase;
 
+namespace content {
+class WebContents;
+}
+
 namespace gfx {
 class Rect;
 }
 
 namespace WebKit {
 struct WebScreenInfo;
 }
 
 namespace autofill {
 namespace risk {
 
 class Fingerprint;
 
 // Asynchronously calls |callback| with statistics that, collectively, provide a
 // unique fingerprint for this (machine, user) pair, used for fraud prevention.
 // The |gaia_id| should be the user id for Google's authentication system.
 // The |window_bounds| should be the bounds of the containing Chrome window.
-// The |content_bounds| should be the bounds of the web contents view for the
-// page the user is interacting with.  The |prefs| should reflect the active
-// Chrome profile's user preferences.
+// The |web_contents| should be host for the page the user is interacting with.
+// The |prefs| should reflect the active Chrome profile's user preferences.
 void GetFingerprint(
     int64 gaia_id,
     const gfx::Rect& window_bounds,
-    const gfx::Rect& content_bounds,
-    const WebKit::WebScreenInfo& screen_info,
+    const content::WebContents& web_contents,
     const PrefServiceBase& prefs,
     const base::Callback<void(scoped_ptr<Fingerprint>)>& callback);
 
 }  // namespace risk
 }  // namespace autofill
 
 #endif  // CHROME_BROWSER_AUTOFILL_RISK_FINGERPRINT_H_