[Password Manager] Presave the form with generated password till successful login

chrome/renderer/autofill/password_generation_agent_browsertest.cc

Index: chrome/renderer/autofill/password_generation_agent_browsertest.cc
diff --git a/chrome/renderer/autofill/password_generation_agent_browsertest.cc b/chrome/renderer/autofill/password_generation_agent_browsertest.cc
index 410b75b8ba8675c49412455c0a1286e1ade25051..333d34c5c354a6fb7835c1ade5a0c8023a6a955e 100644
--- a/chrome/renderer/autofill/password_generation_agent_browsertest.cc
+++ b/chrome/renderer/autofill/password_generation_agent_browsertest.cc
@@ -607,4 +607,37 @@ TEST_F(PasswordGenerationAgentTest, ManualGenerationChangeFocusTest) {
   ExpectGenerationAvailable("second_password", false);
 }
 
+TEST_F(PasswordGenerationAgentTest, PresavingGeneratedPassword) {
+  const char* const kForms[] = {kAccountCreationFormHTML,
+                                kAccountCreationNoForm};
+  for (const char* const form : kForms) {
+    SCOPED_TRACE(testing::Message("form: ") << form);
+    LoadHTMLWithUserGesture(form);
+    // To be able to work with input elements outside <form>'s, use manual
+    // generation.
+    ShowGenerationPopUpManually("first_password");
+    ExpectGenerationAvailable("first_password", true);
+
+    base::string16 password = base::ASCIIToUTF16("random_password");
+    AutofillMsg_GeneratedPasswordAccepted msg(0, password);
+    password_generation_->OnMessageReceived(msg);
+    EXPECT_TRUE(render_thread_->sink().GetFirstMessageMatching(
+        AutofillHostMsg_PresaveGeneratedPassword::ID));
+    render_thread_->sink().ClearMessages();
+
+    FocusField("first_password");
+    SimulateUserTypingASCIICharacter('a', true);
+    EXPECT_TRUE(render_thread_->sink().GetFirstMessageMatching(
+        AutofillHostMsg_UpdatePresavedPassword::ID));
+    render_thread_->sink().ClearMessages();
+
+    for (size_t i = 0; i < password.length(); ++i)
+      SimulateUserTypingASCIICharacter(ui::VKEY_BACK, false);
+    SimulateUserTypingASCIICharacter(ui::VKEY_BACK, true);
+    EXPECT_TRUE(render_thread_->sink().GetFirstMessageMatching(
+        AutofillHostMsg_PasswordNoLongerGenerated::ID));
+    render_thread_->sink().ClearMessages();
+  }
+}
+
 }  // namespace autofill