[OriginChip] Add animations for the hiding and showing of the chip.

chrome/browser/ui/omnibox/omnibox_edit_controller.h

Index: chrome/browser/ui/omnibox/omnibox_edit_controller.h
diff --git a/chrome/browser/ui/omnibox/omnibox_edit_controller.h b/chrome/browser/ui/omnibox/omnibox_edit_controller.h
index 27572102a59db3e554c1e13fa36375b1a7e0384a..9b9f08e2f795f546d3a868c812bf0e547d895061 100644
--- a/chrome/browser/ui/omnibox/omnibox_edit_controller.h
+++ b/chrome/browser/ui/omnibox/omnibox_edit_controller.h
@@ -44,6 +44,16 @@ class OmniboxEditController {
   // Called whenever the autocomplete edit gets focused.
   virtual void OnSetFocus() = 0;
 
+  // Hides the origin chip and shows the URL.
+  virtual void ShowURL() = 0;
+
+  // Hides the origin chip while leaving the Omnibox empty.
+  void HideOriginChip();
+
+  // Shows the origin chip.  Hides the URL if it was previously shown by a call
+  // to ShowURL().
+  void ShowOriginChip();
+
   // Returns the InstantController, or NULL if instant is not enabled.
   virtual InstantController* GetInstant() = 0;
 
@@ -57,6 +67,9 @@ class OmniboxEditController {
   explicit OmniboxEditController(CommandUpdater* command_updater);
   virtual ~OmniboxEditController();
 
+  // Hides the URL and shows the origin chip.
+  virtual void HideURL() = 0;
+
   CommandUpdater* command_updater() { return command_updater_; }
   GURL destination_url() const { return destination_url_; }
   WindowOpenDisposition disposition() const { return disposition_; }