Add Generic Implementation of ClipboardRecentContent

components/omnibox/browser/autocomplete_controller.h

Index: components/omnibox/browser/autocomplete_controller.h
diff --git a/components/omnibox/browser/autocomplete_controller.h b/components/omnibox/browser/autocomplete_controller.h
index 4859fba6febdf45b3264663b4538af1a618bc431..478e72e4bd39c9f7332a0c646364b4208cb4a058 100644
--- a/components/omnibox/browser/autocomplete_controller.h
+++ b/components/omnibox/browser/autocomplete_controller.h
@@ -5,6 +5,8 @@
 #ifndef COMPONENTS_OMNIBOX_BROWSER_AUTOCOMPLETE_CONTROLLER_H_
 #define COMPONENTS_OMNIBOX_BROWSER_AUTOCOMPLETE_CONTROLLER_H_
 
+#include <memory>
+
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
@@ -19,6 +21,7 @@
 #include "components/omnibox/browser/autocomplete_result.h"
 
 class AutocompleteControllerDelegate;
+class ClipboardRecentContent;
 class HistoryURLProvider;
 class KeywordProvider;
 class SearchProvider;
@@ -206,6 +209,9 @@ class AutocompleteController : public AutocompleteProviderListener {
 
   ZeroSuggestProvider* zero_suggest_provider_;
 
+  // Used to build the ClipboardURLProvider.
+  std::unique_ptr<ClipboardRecentContent> clipboard_recent_content_;
+
   // Input passed to Start.
   AutocompleteInput input_;