Do not involve PasswordManagerDriver in filling HTTP-auth forms; also check realm

chrome/browser/ui/cocoa/login_prompt_cocoa.mm

Index: chrome/browser/ui/cocoa/login_prompt_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/login_prompt_cocoa.mm b/chrome/browser/ui/cocoa/login_prompt_cocoa.mm
index c2a6a8ea4cdb8dcacc5b6f8bb5574e31fa466f7a..2bba75fddbd8aeca7190dc7a8c952bf5388501c0 100644
--- a/chrome/browser/ui/cocoa/login_prompt_cocoa.mm
+++ b/chrome/browser/ui/cocoa/login_prompt_cocoa.mm
@@ -41,8 +41,9 @@ class LoginHandlerMac : public LoginHandler,
   }
 
   // LoginModelObserver implementation.
-  void OnAutofillDataAvailable(const base::string16& username,
-                               const base::string16& password) override {
+  void OnAutofillDataAvailableInternal(
+      const base::string16& username,
+      const base::string16& password) override {
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
     [sheet_controller_ autofillLogin:base::SysUTF16ToNSString(username)
@@ -51,14 +52,17 @@ class LoginHandlerMac : public LoginHandler,
   void OnLoginModelDestroying() override {}
 
   // LoginHandler:
-  void BuildViewForPasswordManager(password_manager::PasswordManager* manager,
-                                   const base::string16& explanation) override {
+  void BuildViewForPasswordManager(
+      password_manager::PasswordManager* manager,
+      const base::string16& explanation,
+      const autofill::PasswordForm* observed_form) override {
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
+    DCHECK_EQ(manager == nullptr, observed_form == nullptr);
 
     sheet_controller_.reset(
         [[LoginHandlerSheet alloc] initWithLoginHandler:this]);
 
-    SetModel(manager);
+    SetModel(manager, observed_form);
 
     [sheet_controller_ setExplanation:base::SysUTF16ToNSString(explanation)];
 
@@ -88,7 +92,7 @@ class LoginHandlerMac : public LoginHandler,
   // Overridden from ConstrainedWindowMacDelegate:
   void OnConstrainedWindowClosed(ConstrainedWindowMac* window) override {
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
-    SetModel(NULL);
+    SetModel(nullptr, nullptr);
     ReleaseSoon();
 
     constrained_window_.reset();