Zoom Extension API

chrome/browser/ui/tabs/tab_strip_model_observer.h

Index: chrome/browser/ui/tabs/tab_strip_model_observer.h
diff --git a/chrome/browser/ui/tabs/tab_strip_model_observer.h b/chrome/browser/ui/tabs/tab_strip_model_observer.h
index 52b656c365f5e37b88826f5ef2278b32f6fc6786..8df0543959c1bf87454e5068d3f0222bb3b6a61f 100644
--- a/chrome/browser/ui/tabs/tab_strip_model_observer.h
+++ b/chrome/browser/ui/tabs/tab_strip_model_observer.h
@@ -5,6 +5,8 @@
 #ifndef CHROME_BROWSER_UI_TABS_TAB_STRIP_MODEL_OBSERVER_H_
 #define CHROME_BROWSER_UI_TABS_TAB_STRIP_MODEL_OBSERVER_H_
 
+#include "content/public/common/page_zoom.h"
+
 class TabStripModel;
 
 namespace content {
@@ -150,6 +152,12 @@ class TabStripModelObserver {
   // must be dropped.
   virtual void TabStripModelDeleted();
 
+  // A zoom change has been initiated in a tab.
+  virtual void TabZoomChange(content::WebContents* contents,
+                             double old_zoom_level,
+                             double new_zoom_level,
+                             content::ZoomMode zoom_mode);
+
  protected:
   virtual ~TabStripModelObserver() {}
 };