[Passwords] Implement IOSChromePasswordManager::IsMainFrameSecure

This change implements IOSChromePasswordManager::IsMainFrameSecure by
exposing the WebState on the PasswordManagerClientDelegate and then
using it to call WebStateContentIsSecureHtml().

Bug: 940906
Change-Id: Ia5afca02f141cf601c1b09e7f693f4dc2810daa7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1538510Reviewed-by: Vasilii Sukhanov <vasilii@chromium.org>
Commit-Queue: Jan Wilken Dörrie <jdoerrie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#644373}

ios/chrome/browser/passwords/ios_chrome_password_manager_client.h

@@ -22,6 +22,10 @@ namespace password_manager {
 class PasswordFormManagerForUI;
 }
 
+namespace web {
+class WebState;
+}
+
 @protocol PasswordManagerClientDelegate
 
 // Shows UI to prompt the user to save the password.
@@ -36,6 +40,8 @@ class PasswordFormManagerForUI;
 - (void)showAutosigninNotification:
     (std::unique_ptr<autofill::PasswordForm>)formSignedIn;
 
+@property(readonly, nonatomic) web::WebState* webState;
+
 @property(readonly, nonatomic) ios::ChromeBrowserState* browserState;
 
 @property(readonly) password_manager::PasswordManager* passwordManager;
@@ -78,6 +84,7 @@ class IOSChromePasswordManagerClient
           saved_form_manager) override;
   bool IsIncognito() const override;
   const password_manager::PasswordManager* GetPasswordManager() const override;
+  bool IsMainFrameSecure() const override;
   PrefService* GetPrefs() const override;
   password_manager::PasswordStore* GetPasswordStore() const override;
   void NotifyUserAutoSignin(

ios/chrome/browser/passwords/ios_chrome_password_manager_client.mm

@@ -22,6 +22,7 @@
 #include "components/translate/core/browser/translate_manager.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#include "ios/chrome/browser/passwords/credential_manager_util.h"
 #include "ios/chrome/browser/passwords/ios_chrome_password_store_factory.h"
 #include "ios/chrome/browser/passwords/password_manager_internals_service_factory.h"
 #include "ios/chrome/browser/signin/identity_manager_factory.h"
@@ -137,6 +138,10 @@ IOSChromePasswordManagerClient::GetPasswordManager() const {
   return delegate_.passwordManager;
 }
 
+bool IOSChromePasswordManagerClient::IsMainFrameSecure() const {
+  return WebStateContentIsSecureHtml(delegate_.webState);
+}
+
 PrefService* IOSChromePasswordManagerClient::GetPrefs() const {
   return (delegate_.browserState)->GetPrefs();
 }

ios/chrome/browser/passwords/password_controller.mm

@@ -502,6 +502,10 @@ void LogSuggestionShown(PasswordSuggestionType type) {
 
 #pragma mark - PasswordManagerClientDelegate
 
+- (web::WebState*)webState {
+  return _webState;
+}
+
 - (ios::ChromeBrowserState*)browserState {
   return _webState ? ios::ChromeBrowserState::FromBrowserState(
                          _webState->GetBrowserState())