components: Cleanup class/struct fwd declarations

components/omnibox/browser/omnibox_controller.h

Index: components/omnibox/browser/omnibox_controller.h
diff --git a/components/omnibox/browser/omnibox_controller.h b/components/omnibox/browser/omnibox_controller.h
index 8184efb7817613ca64faf1dd0411a0199ba2f79f..0c94d4cb218801ea652de6b86a47ccea59da24cf 100644
--- a/components/omnibox/browser/omnibox_controller.h
+++ b/components/omnibox/browser/omnibox_controller.h
@@ -14,7 +14,6 @@
 #include "components/omnibox/browser/autocomplete_controller_delegate.h"
 #include "components/omnibox/browser/autocomplete_match.h"
 
-class AUtocompleteInput;
 struct AutocompleteMatch;
 class AutocompleteResult;
 class InstantController;
@@ -22,10 +21,6 @@ class OmniboxClient;
 class OmniboxEditModel;
 class OmniboxPopupModel;
 
-namespace gfx {
-class Rect;
-}
-
 // This class controls the various services that can modify the content
 // for the omnibox, including AutocompleteController and InstantController. It
 // is responsible of updating the omnibox content.