autocomplete: Add AutocompleteProvider::Type enum.

chrome/browser/autocomplete/autocomplete_controller.h

Index: chrome/browser/autocomplete/autocomplete_controller.h
diff --git a/chrome/browser/autocomplete/autocomplete_controller.h b/chrome/browser/autocomplete/autocomplete_controller.h
index c66d024402b98bfdeb0c4485b448c26fcaeb1d77..2599448fa393d579666c3bbb71e6be2a2553cb80 100644
--- a/chrome/browser/autocomplete/autocomplete_controller.h
+++ b/chrome/browser/autocomplete/autocomplete_controller.h
@@ -50,8 +50,13 @@ class AutocompleteController : public AutocompleteProviderListener {
   // second to set the providers to some known testing providers.  The default
   // providers will be overridden and the controller will take ownership of the
   // providers, Release()ing them on destruction.
+  //
+  // |provider_types| is a bitmap containing AutocompleteProvider::Type values
+  // that will (potentially, depending on platform, flags, etc.) be
+  // instantiated.
   AutocompleteController(Profile* profile,
-                         AutocompleteControllerDelegate* delegate);
+                         AutocompleteControllerDelegate* delegate,
+                         int provider_types);
 #ifdef UNIT_TEST
   AutocompleteController(const ACProviders& providers, Profile* profile)
       : delegate_(NULL),