Refactor omnibox focus API into a single method.

chrome/browser/ui/omnibox/omnibox_edit_model.h

Index: chrome/browser/ui/omnibox/omnibox_edit_model.h
diff --git a/chrome/browser/ui/omnibox/omnibox_edit_model.h b/chrome/browser/ui/omnibox/omnibox_edit_model.h
index 2f8868d81c6e7c2ff7bff32421d62f0923b1131a..af46490a3dc60f95a21af2982ca17b4f548632fa 100644
--- a/chrome/browser/ui/omnibox/omnibox_edit_model.h
+++ b/chrome/browser/ui/omnibox/omnibox_edit_model.h
@@ -13,6 +13,7 @@
 #include "chrome/browser/autocomplete/autocomplete_controller_delegate.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
 #include "chrome/common/metrics/proto/omnibox_event.pb.h"
+#include "chrome/common/omnibox_focus_state.h"
 #include "content/public/common/page_transition_types.h"
 #include "googleurl/src/gurl.h"
 #include "ui/base/window_open_disposition.h"
@@ -32,18 +33,6 @@ class Image;
 class Rect;
 }
 
-// Omnibox focus state.
-enum OmniboxFocusState {
-  // Not focused.
-  OMNIBOX_FOCUS_NONE,
-
-  // Visibly focused.
-  OMNIBOX_FOCUS_VISIBLE,
-
-  // Invisibly focused, i.e. focused with a hidden caret.
-  OMNIBOX_FOCUS_INVISIBLE,
-};
-
 // Reasons why the Omnibox focus state could change.
 enum OmniboxFocusChangeReason {
   // Includes any explicit changes to focus. (e.g. user clicking to change