Trigger Password Protection ping on username/password field on focus

components/autofill/content/renderer/password_autofill_agent.h

Index: components/autofill/content/renderer/password_autofill_agent.h
diff --git a/components/autofill/content/renderer/password_autofill_agent.h b/components/autofill/content/renderer/password_autofill_agent.h
index 486e8eb34e3202f29e56a32a4083a2098f530edc..58e248021c0b35962ce74120b80c12adab97183a 100644
--- a/components/autofill/content/renderer/password_autofill_agent.h
+++ b/components/autofill/content/renderer/password_autofill_agent.h
@@ -88,10 +88,12 @@ class PasswordAutofillAgent : public content::RenderFrameObserver,
   bool DidClearAutofillSelection(
       const blink::WebFormControlElement& control_element);
 
-  // If the form is non-secure, show the "Not Secure" warning on username and
-  // password input fields.
+  // If "Login not secure" feature is enabled and if the form is non-secure.

[Mathieu, 2017/05/01 13:40:00]

// Returns whether a "Login not secure" warning should be shown on the input
field. This is true if the feature is enabled and if the form is non-secure,

[Jialiu Lin, 2017/05/01 18:59:10]

Done.

   bool ShouldShowNotSecureWarning(const blink::WebInputElement& element);
 
+  // If the element is a username or password textfield.

[Mathieu, 2017/05/01 13:40:00]

*Returns whether the element is...

[Jialiu Lin, 2017/05/01 18:59:09]

Done.

+  bool IsUsernameOrPasswordField(const blink::WebInputElement& element);
+
   // Shows an Autofill popup with username suggestions for |element|. If
   // |show_all| is |true|, will show all possible suggestions for that element,
   // otherwise shows suggestions based on current value of |element|.
@@ -286,6 +288,9 @@ class PasswordAutofillAgent : public content::RenderFrameObserver,
   // True indicates that a request for credentials has been sent to the store.
   bool sent_request_to_store_;
 
+  // True indicates that a safe browsing reputation check has been triggered.
+  bool checked_safe_browsing_reputation_;
+
   // Records the username typed before suggestions preview.
   base::string16 username_query_prefix_;