Autofill: Refactoring to support fetching password after a username is selected

components/autofill/core/browser/password_autofill_manager.h

Index: components/autofill/core/browser/password_autofill_manager.h
diff --git a/components/autofill/core/browser/password_autofill_manager.h b/components/autofill/core/browser/password_autofill_manager.h
index ddde78eb0faa337f9a1ef49f98af8daca681e231..c9f43549f68224f5e527fcaa1aa85eba264ca74a 100644
--- a/components/autofill/core/browser/password_autofill_manager.h
+++ b/components/autofill/core/browser/password_autofill_manager.h
@@ -16,6 +16,8 @@
 
 #include "components/autofill/core/common/password_form_fill_data.h"
 
+class PasswordManagerClient;
+
 namespace autofill {
 
 class AutofillDriver;
@@ -23,12 +25,13 @@ class AutofillDriver;
 // This class is responsible for filling password forms.
 class PasswordAutofillManager {
  public:
-  explicit PasswordAutofillManager(AutofillDriver* autofill_driver);
+  PasswordAutofillManager(
+      PasswordManagerClient* password_manager_client,
+      AutofillDriver* autofill_driver);
   virtual ~PasswordAutofillManager();
 
-  // Fills the password associated with user name |username|. Returns true if
-  // the username and password fields were filled, false otherwise.
-  bool DidAcceptAutofillSuggestion(const FormFieldData& field,
+  // Fills the password associated with user name |username|.
+  void DidAcceptAutofillSuggestion(const FormFieldData& field,
                                    const base::string16& username);
 
   // Invoked when a password mapping is added.
@@ -43,15 +46,15 @@ class PasswordAutofillManager {
   // TODO(csharp): Modify the AutofillExternalDeletegate code so that it can
   // figure out if a entry is a password one without using this mapping.
   // crbug.com/118601
-  typedef std::map<FormFieldData,
-                   PasswordFormFillData>
-      LoginToPasswordInfoMap;
+  typedef std::map<FormFieldData, PasswordFormFillData> LoginToPasswordInfoMap;
 
-  // Returns true if |current_username| matches a username for one of the
-  // login mappings in |password|.
-  bool WillFillUserNameAndPassword(
+  // If |current_username| matches a username for one of the login mappings in
+  // |fill_data|, returns true and assigns the password to |out_password|.
+  // Otherwise, returns false and leaves |out_password| untouched.
+  bool GetPasswordForUsername(
       const base::string16& current_username,
-      const PasswordFormFillData& password);
+      const PasswordFormFillData& fill_data,
+      base::string16* out_password);
 
   // Finds login information for a |node| that was previously filled.
   bool FindLoginInfo(const FormFieldData& field,
@@ -60,6 +63,9 @@ class PasswordAutofillManager {
   // The logins we have filled so far with their associated info.
   LoginToPasswordInfoMap login_to_password_info_;
 
+  // Provides embedder-level operations on passwords. Must outlive |this|.
+  PasswordManagerClient* const password_manager_client_;  // weak
+
   // Provides driver-level context to the shared code of the component. Must
   // outlive |this|.
   AutofillDriver* const autofill_driver_;  // weak