Fix page zoom for plug-in documents (PDF, etc.)

chrome/browser/ui/prefs/prefs_tab_helper.cc

 // Copyright (c) 2011 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 "chrome/browser/ui/prefs/prefs_tab_helper.h"
 
 #include "base/stringprintf.h"
 #include "base/string_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prefs/pref_service.h"
@@ skipping 24 matching lines @@
   WebPreferences pref_defaults;
 
   prefs->RegisterBooleanPref(prefs::kWebKitJavascriptEnabled,
                              pref_defaults.javascript_enabled,
                              PrefService::UNSYNCABLE_PREF);
 }
 
 // The list of prefs we want to observe.
 const char* kPrefsToObserve[] = {
   prefs::kDefaultCharset,
+  prefs::kDefaultZoomLevel,
   prefs::kEnableReferrers,
   prefs::kWebKitAllowDisplayingInsecureContent,
   prefs::kWebKitAllowRunningInsecureContent,
   prefs::kWebKitCursiveFontFamily,
   prefs::kWebKitDefaultFixedFontSize,
   prefs::kWebKitDefaultFontSize,
   prefs::kWebKitFantasyFontFamily,
   prefs::kWebKitFixedFontFamily,
   prefs::kWebKitGlobalJavascriptEnabled,
   prefs::kWebKitJavaEnabled,
@@ skipping 347 matching lines @@
     }
 #endif
     case chrome::NOTIFICATION_PREF_CHANGED: {
       std::string* pref_name_in = content::Details<std::string>(details).ptr();
       DCHECK(content::Source<PrefService>(source).ptr() ==
                  wrapper_->profile()->GetPrefs() ||
              content::Source<PrefService>(source).ptr() == per_tab_prefs_);
       if ((*pref_name_in == prefs::kDefaultCharset) ||
           StartsWithASCII(*pref_name_in, "webkit.webprefs.", true)) {
         UpdateWebPreferences();
-      } else if (*pref_name_in == prefs::kEnableReferrers) {
+      } else if (*pref_name_in == prefs::kDefaultZoomLevel ||
+                 *pref_name_in == prefs::kEnableReferrers) {
         UpdateRendererPreferences();
       } else {
         NOTREACHED() << "unexpected pref change notification" << *pref_name_in;
       }
       break;
     }
     default:
       NOTREACHED();
   }
 }
 
 void PrefsTabHelper::UpdateWebPreferences() {
   RenderViewHostDelegate* rvhd = tab_contents();
   WebPreferences prefs = rvhd->GetWebkitPrefs();
   prefs.javascript_enabled =
       per_tab_prefs_->GetBoolean(prefs::kWebKitJavascriptEnabled);
   tab_contents()->render_view_host()->UpdateWebkitPreferences(prefs);
 }
 
 void PrefsTabHelper::UpdateRendererPreferences() {
   renderer_preferences_util::UpdateFromSystemSettings(
       tab_contents()->GetMutableRendererPrefs(), wrapper_->profile());
   tab_contents()->render_view_host()->SyncRendererPrefs();
 }