Password manager: introduce logging for the internals page

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 2e45d46b5ef74ef01a11e4d59e2e43a59820b717..24a7aa9099f7f7e37200b66cc1db11d9f4b64e14 100644
--- a/components/autofill/content/renderer/password_autofill_agent.h
+++ b/components/autofill/content/renderer/password_autofill_agent.h
@@ -130,6 +130,7 @@ class PasswordAutofillAgent : public content::RenderViewObserver {
 
   // RenderView IPC handlers:
   void OnFillPasswordForm(const PasswordFormFillData& form_data);
+  void OnChangeLoggingState(bool active);
 
   // Scans the given frame for password forms and sends them up to the browser.
   // If |only_visible| is true, only forms visible in the layout are sent.
@@ -195,6 +196,9 @@ class PasswordAutofillAgent : public content::RenderViewObserver {
 
   PasswordValueGatekeeper gatekeeper_;
 
+  // True indicates that user debug information should be logged.
+  bool logging_state_active_;
+
   base::WeakPtrFactory<PasswordAutofillAgent> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordAutofillAgent);