Trigger protected password entry request on password reuse event.

components/safe_browsing/password_protection/password_protection_request.h

Index: components/safe_browsing/password_protection/password_protection_request.h
diff --git a/components/safe_browsing/password_protection/password_protection_request.h b/components/safe_browsing/password_protection/password_protection_request.h
index 80193e234320c5c7deba0c60cf0cdbe54c2ab5dd..f03e421286f70248883f91f31d54231e97e2ad45 100644
--- a/components/safe_browsing/password_protection/password_protection_request.h
+++ b/components/safe_browsing/password_protection/password_protection_request.h
@@ -61,6 +61,7 @@ class PasswordProtectionRequest : public base::RefCountedThreadSafe<
   PasswordProtectionRequest(const GURL& main_frame_url,
                             const GURL& password_form_action,
                             const GURL& password_form_frame_url,
+                            const std::string& legitinate_domain,

[Nathan Parker, 2017/05/12 22:27:59]

nit: spelling. legitimate_domain

[Jialiu Lin, 2017/05/13 00:24:12]

Done. 

                             LoginReputationClientRequest::TriggerType type,
                             PasswordProtectionService* pps,
                             int request_timeout_in_ms);
@@ -127,6 +128,9 @@ class PasswordProtectionRequest : public base::RefCountedThreadSafe<
   // Frame url of the detected password form.
   const GURL password_form_frame_url_;
 
+  // Legitimate domain on which a password is saved and gets reused.
+  const std::string legitimate_domain_;

[Nathan Parker, 2017/05/12 22:27:59]

Could we call this "saved_domain" or "associated_domain"?  Or is
legitimate_domain used elsewhere already? I'm assuming eventually this'll be a
vector.

[Jialiu Lin, 2017/05/13 00:24:12]

Rename to "saved_domain".
"legitimate_domain" is used by PasswordReuseDetectionManager::OnReuseFound(). 
"saved_domain" is more easier to understand. 
I'll do the string to vector change later when password_manager function is
ready to expose all saved domains.

+
   // If this request is for unfamiliar login page or for a password reuse event.
   const LoginReputationClientRequest::TriggerType request_type_;