Generate passwords only for forms that autofill server marks as account creation forms.

components/autofill/content/renderer/password_generation_manager.h

Index: components/autofill/content/renderer/password_generation_manager.h
diff --git a/components/autofill/content/renderer/password_generation_manager.h b/components/autofill/content/renderer/password_generation_manager.h
index a61542861677bbef405e9fabb77c9ed2d9939b24..8b3f65613fe1aab45b0526859c727941048e6515 100644
--- a/components/autofill/content/renderer/password_generation_manager.h
+++ b/components/autofill/content/renderer/password_generation_manager.h
@@ -54,6 +54,7 @@ class PasswordGenerationManager : public content::RenderViewObserver,
   void OnFormNotBlacklisted(const content::PasswordForm& form);
   void OnPasswordAccepted(const base::string16& password);
   void OnPasswordGenerationEnabled(bool enabled);
+  void OnAccountCreationFormsDetected(const std::vector<GURL>& origins);
 
   // Helper function to decide whether we should show password generation icon.
   void MaybeShowIcon();
@@ -72,6 +73,10 @@ class PasswordGenerationManager : public content::RenderViewObserver,
   // passwords for this site".
   std::vector<GURL> not_blacklisted_password_form_origins_;
 
+  // Stores the origins of the password forms that autofill server classifies
+  // one of its fields as ACCOUNT_CREATION_PASSWORD.

[Ilya Sherman, 2013/08/29 23:08:13]

nit: Several small wording tweaks: "Stores the origin of each password form for
which the Autofill server classifies one of the form's fields as an
ACCOUNT_CREATION_PASSWORD."

[zysxqn, 2013/09/03 23:00:20]

Done.

+  std::vector<GURL> autofill_account_creation_form_origins_;
+
   std::vector<WebKit::WebInputElement> passwords_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordGenerationManager);