Stop manually calling AddRef/Release for AutocompleteController::providers_

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 51794ce1303b192a82efed4b598955e4dde92e12..9fedb1d63bf141d6f50ba9b15a9816e43071a4f8 100644
--- a/chrome/browser/autocomplete/autocomplete_controller.h
+++ b/chrome/browser/autocomplete/autocomplete_controller.h
@@ -8,6 +8,7 @@
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
+#include "base/memory/ref_counted.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
@@ -46,6 +47,8 @@ class ZeroSuggestProvider;
 // matches from a series of providers into one AutocompleteResult.
 class AutocompleteController : public AutocompleteProviderListener {
  public:
+  typedef std::vector<scoped_refptr<AutocompleteProvider> > Providers;
+
   // |provider_types| is a bitmap containing AutocompleteProvider::Type values
   // that will (potentially, depending on platform, flags, etc.) be
   // instantiated. |template_url_service| is used to create URLs from the
@@ -129,7 +132,7 @@ class AutocompleteController : public AutocompleteProviderListener {
 
   const AutocompleteResult& result() const { return result_; }
   bool done() const { return done_; }
-  const ACProviders* providers() const { return &providers_; }
+  const Providers& providers() const { return providers_; }
 
   const base::TimeTicks& last_time_default_match_changed() const {
     return last_time_default_match_changed_;
@@ -191,7 +194,7 @@ class AutocompleteController : public AutocompleteProviderListener {
   AutocompleteControllerDelegate* delegate_;
 
   // A list of all providers.
-  ACProviders providers_;
+  Providers providers_;
 
   HistoryURLProvider* history_url_provider_;