Move ZoomObserver, ZoomController and ZoomEventManager to components/.

chrome/browser/ui/cocoa/location_bar/zoom_decoration.h

Index: chrome/browser/ui/cocoa/location_bar/zoom_decoration.h
diff --git a/chrome/browser/ui/cocoa/location_bar/zoom_decoration.h b/chrome/browser/ui/cocoa/location_bar/zoom_decoration.h
index a856a2f2704c55f1cc584894521dd3c9d1927491..90ef008e6557a84a392a664146cb11d03cd97266 100644
--- a/chrome/browser/ui/cocoa/location_bar/zoom_decoration.h
+++ b/chrome/browser/ui/cocoa/location_bar/zoom_decoration.h
@@ -13,9 +13,12 @@
 
 class LocationBarViewMac;
 @class ZoomBubbleController;
-class ZoomController;
 class ZoomDecorationTest;
 
+namespace ui_zoom {
+class ZoomController;
+}
+
 // Zoom icon at the end of the omnibox (close to page actions) when at a
 // non-standard zoom level.
 class ZoomDecoration : public ImageDecoration,
@@ -26,7 +29,7 @@ class ZoomDecoration : public ImageDecoration,
 
   // Called when this decoration should show or hide itself in its most current
   // state. Returns whether any updates were made.
-  bool UpdateIfNecessary(ZoomController* zoom_controller);
+  bool UpdateIfNecessary(ui_zoom::ZoomController* zoom_controller);
 
   // Shows the zoom bubble for this decoration. If |auto_close| is YES, then
   // the bubble will automatically close after a fixed period of time.
@@ -42,7 +45,7 @@ class ZoomDecoration : public ImageDecoration,
 
   // Show and update UI associated with the zoom decoration.
   // Virtual and protected for testing.
-  virtual void ShowAndUpdateUI(ZoomController* zoom_controller,
+  virtual void ShowAndUpdateUI(ui_zoom::ZoomController* zoom_controller,
                                NSString* tooltip_string);
 
  private: