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

chrome/browser/ui/gtk/location_bar_view_gtk.h

Index: chrome/browser/ui/gtk/location_bar_view_gtk.h
diff --git a/chrome/browser/ui/gtk/location_bar_view_gtk.h b/chrome/browser/ui/gtk/location_bar_view_gtk.h
index 61504092cd5a8132a84f6f9ba1e068eb4ffdec59..87450fe490cf49b3d410e90e0cd81f1dce409e4c 100644
--- a/chrome/browser/ui/gtk/location_bar_view_gtk.h
+++ b/chrome/browser/ui/gtk/location_bar_view_gtk.h
@@ -112,6 +112,7 @@ class LocationBarViewGtk : public OmniboxEditController,
   virtual void Update(const content::WebContents* contents) OVERRIDE;
   virtual void OnChanged() OVERRIDE;
   virtual void OnSetFocus() OVERRIDE;
+  virtual void ShowURL() OVERRIDE;
   virtual InstantController* GetInstant() OVERRIDE;
   virtual content::WebContents* GetWebContents() OVERRIDE;
   virtual ToolbarModel* GetToolbarModel() OVERRIDE;
@@ -210,6 +211,10 @@ class LocationBarViewGtk : public OmniboxEditController,
     DISALLOW_COPY_AND_ASSIGN(PageToolViewGtk);
   };
 
+ protected:
+  // OmniboxEditController:
+  virtual void HideURL() OVERRIDE;
+
  private:
   class PageActionViewGtk :
        public ExtensionActionIconFactory::Observer,