Tracks changes to zoom icon and zoom percentage. Notifies browser window if the icon should be chan…

chrome/browser/ui/browser.h

Index: chrome/browser/ui/browser.h
diff --git a/chrome/browser/ui/browser.h b/chrome/browser/ui/browser.h
index 05a74418895e9d46d228e47423b33a73e8730547..c4c53756ec0cc588d1d3c100d85123878eb61c2c 100644
--- a/chrome/browser/ui/browser.h
+++ b/chrome/browser/ui/browser.h
@@ -40,6 +40,7 @@
 #include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 #include "chrome/browser/ui/toolbar/toolbar_model.h"
 #include "chrome/browser/ui/webui/sync_promo/sync_promo_ui.h"
+#include "chrome/browser/ui/zoom/zoom_observer.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/content_settings_types.h"
 #include "chrome/common/extensions/extension_constants.h"
@@ -98,6 +99,7 @@ class Browser : public TabStripModelDelegate,
                 public ConstrainedWindowTabHelperDelegate,
                 public BlockedContentTabHelperDelegate,
                 public BookmarkTabHelperDelegate,
+                public ZoomObserver,
                 public ExtensionTabHelperDelegate,
                 public content::PageNavigator,
                 public CommandUpdater::CommandUpdaterDelegate,
@@ -1019,6 +1021,13 @@ class Browser : public TabStripModelDelegate,
   virtual void URLStarredChanged(TabContentsWrapper* source,
                                  bool starred) OVERRIDE;
 
+  // Overridden from ZoomObserver:
+  virtual void OnZoomIconChanged(TabContentsWrapper* source,
+                                 ZoomController::ZoomIconState state) OVERRIDE;
+  virtual void OnZoomChanged(TabContentsWrapper* source,
+                             int zoom_percent,
+                             bool can_show_bubble) OVERRIDE;
+
   // Overridden from ExtensionTabHelperDelegate:
   virtual void OnDidGetApplicationInfo(TabContentsWrapper* source,
                                        int32 page_id) OVERRIDE;