Remove RenderViewObserver::ZoomLevelChanged.

content/renderer/render_view_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 3922 matching lines @@
                                        double maximum_level) {
   int minimum_percent = static_cast<int>(
       ZoomLevelToZoomFactor(minimum_level) * 100);
   int maximum_percent = static_cast<int>(
       ZoomLevelToZoomFactor(maximum_level) * 100);
 
   Send(new ViewHostMsg_UpdateZoomLimits(
       routing_id_, minimum_percent, maximum_percent));
 }
 
 void RenderViewImpl::zoomLevelChanged() {

[Ilya Sherman, 2014/07/11 19:19:44]

Just to confirm: Is this method still called in some cases, or is it obsolete as
well?

   double zoom_level = webview()->zoomLevel();
 
-  FOR_EACH_OBSERVER(RenderViewObserver, observers_, ZoomLevelChanged());
-
   // Do not send empty URLs to the browser when we are just setting the default
   // zoom level (from RendererPreferences) before the first navigation.
   if (!webview()->mainFrame()->document().url().isEmpty()) {
     // Tell the browser which url got zoomed so it can update the menu and the
     // saved values if necessary
     Send(new ViewHostMsg_DidZoomURL(
         routing_id_, zoom_level,
         GURL(webview()->mainFrame()->document().url())));
   }
 }
@@ skipping 339 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content