Adds notification of when zoom level changes. I'm going to need this

chrome/common/notification_type.h

Index: chrome/common/notification_type.h
diff --git a/chrome/common/notification_type.h b/chrome/common/notification_type.h
index 5d15273f034d2f3b069f2d5dad8ed671eb0a4d77..2b4e1c515c2d15de7135f94c5c5f506936020bc3 100644
--- a/chrome/common/notification_type.h
+++ b/chrome/common/notification_type.h
@@ -987,6 +987,8 @@ class NotificationType {
     // are a ChromeCookieDetails object.
     COOKIE_CHANGED,
 
+    // Misc --------------------------------------------------------------------
+
 #if defined(OS_CHROMEOS)
     // Sent when a chromium os user logs in.
     LOGIN_USER_CHANGED,
@@ -1016,6 +1018,10 @@ class NotificationType {
     BOOKMARK_CONTEXT_MENU_SHOWN,
 #endif
 
+    // Sent when the zoom level changes. The source is the profile, details the
+    // host as a std::string.

[Peter Kasting, 2010/06/08 17:54:00]

Nit: You should probably give more detail here as the "host" may be a spec for
URLs that don't have a host (e.g. file: URLs).  I'd make a reference to some
comments on this elsewhere (since we note this in a few places already).

+    ZOOM_LEVEL_CHANGED,
+
     // Password Store ----------------------------------------------------------
     // This notification is sent whenenever login entries stored in the password
     // store are changed. The detail of this notification is a list of changes