[gtk] fix zoom bubble showing up on wrong window

chrome/browser/ui/zoom/zoom_controller.h

Index: chrome/browser/ui/zoom/zoom_controller.h
diff --git a/chrome/browser/ui/zoom/zoom_controller.h b/chrome/browser/ui/zoom/zoom_controller.h
index 1431763b65862799749870d6d4347204013aa930..2526ccc9460b8485eb67b4f95f86cdf03f63ffec 100644
--- a/chrome/browser/ui/zoom/zoom_controller.h
+++ b/chrome/browser/ui/zoom/zoom_controller.h
@@ -52,12 +52,10 @@ class ZoomController : public content::NotificationObserver,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // Updates the zoom icon and zoom percentage based on current values and
-  // notifies the observer if changes have occurred. |can_show_bubble| will be
-  // true only if the active window changes the zoom on the current page (i.e.,
-  // inactive window zoom changes, creating a new tab/window, or shifting
-  // between tabs/windows, although they may involve a change in the zoom,
-  // should not trigger showing a bubble).
-  void UpdateState(bool can_show_bubble);
+  // notifies the observer if changes have occurred. |host| may be empty,
+  // meaning the change should apply to ~all sites. If it is not empty, the
+  // change only affects sites with the given host.
+  void UpdateState(const std::string& host);
 
   // The current zoom percentage.
   int zoom_percent_;