MD Settings: handle zoom as floats to fix ghost zoom level issue

chrome/browser/extensions/api/settings_private/settings_private_delegate.cc

 // Copyright 2015 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/extensions/api/settings_private/settings_private_delegate.h"
 
 #include <utility>
 
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 42 matching lines @@
   return std::move(prefs);
 }
 
 PrefsUtil::SetPrefResult SettingsPrivateDelegate::SetPref(
     const std::string& pref_name, const base::Value* value) {
   return prefs_util_->SetPref(pref_name, value);
 }
 
 std::unique_ptr<base::Value> SettingsPrivateDelegate::GetDefaultZoomPercent() {
   double zoom = content::ZoomLevelToZoomFactor(
-      profile_->GetZoomLevelPrefs()->GetDefaultZoomLevelPref()) * 100;
-  std::unique_ptr<base::Value> value(
-      new base::FundamentalValue(std::round(zoom)));
+      profile_->GetZoomLevelPrefs()->GetDefaultZoomLevelPref());
+  std::unique_ptr<base::Value> value(new base::FundamentalValue(zoom));
   return value;
 }
 
 PrefsUtil::SetPrefResult SettingsPrivateDelegate::SetDefaultZoomPercent(
-    int percent) {
-  double zoom_factor = content::ZoomFactorToZoomLevel(percent * 0.01);
+    double percent) {
+  double zoom_factor = content::ZoomFactorToZoomLevel(percent);
   profile_->GetZoomLevelPrefs()->SetDefaultZoomLevelPref(zoom_factor);
   return PrefsUtil::SetPrefResult::SUCCESS;
 }
 
 }  // namespace extensions