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

chrome/browser/ui/tab_contents/core_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/tab_contents/core_tab_helper.h"
 
-#include "chrome/browser/prefs/pref_service.h"
-#include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/renderer_host/web_cache_manager.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
-#include "chrome/common/chrome_notification_types.h"
-#include "chrome/common/pref_names.h"
 #include "content/browser/renderer_host/render_view_host.h"
-#include "content/public/browser/notification_service.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
 CoreTabHelper::CoreTabHelper(TabContentsWrapper* wrapper)
     : TabContentsObserver(wrapper->tab_contents()),
       delegate_(NULL),
       wrapper_(wrapper) {
-  PrefService* prefs = wrapper_->profile()->GetPrefs();
-  if (prefs) {
-    pref_change_registrar_.Init(prefs);
-    pref_change_registrar_.Add(prefs::kDefaultZoomLevel, this);
-  }
 }
 
 CoreTabHelper::~CoreTabHelper() {
 }
 
 string16 CoreTabHelper::GetDefaultTitle() {
   return l10n_util::GetStringUTF16(IDS_DEFAULT_TAB_TITLE);
 }
 
 string16 CoreTabHelper::GetStatusText() const {
@@ skipping 44 matching lines @@
   return string16();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // TabContentsObserver overrides
 
 void CoreTabHelper::DidBecomeSelected() {
   WebCacheManager::GetInstance()->ObserveActivity(
       tab_contents()->GetRenderProcessHost()->GetID());
 }
-
-////////////////////////////////////////////////////////////////////////////////
-// content::NotificationObserver overrides
-
-void CoreTabHelper::Observe(int type,
-                            const content::NotificationSource& source,
-                            const content::NotificationDetails& details) {
-  switch (type) {
-    case chrome::NOTIFICATION_PREF_CHANGED: {
-      std::string* pref_name = content::Details<std::string>(details).ptr();
-      DCHECK(content::Source<PrefService>(source).ptr() ==
-             wrapper_->profile()->GetPrefs());
-      if (*pref_name == prefs::kDefaultZoomLevel) {
-        tab_contents()->render_view_host()->SetZoomLevel(
-            tab_contents()->GetZoomLevel());
-      } else {
-        NOTREACHED() << "unexpected pref change notification" << *pref_name;
-      }
-      break;
-    }
-    default:
-      NOTREACHED();
-  }
-}