Introduce ChromeZoomLevelPref, make zoom level prefs independent of profile prefs.

chrome/browser/ui/zoom/zoom_controller_browsertest.cc

 // Copyright 2014 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/zoom/zoom_controller.h"
 
 #include "base/prefs/pref_service.h"
 #include "base/process/kill.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
+#include "chrome/browser/ui/zoom/chrome_zoom_level_prefs.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/page_type.h"
 #include "content/public/test/browser_test_utils.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ skipping 78 matching lines @@
   // zoom level will change the zoom level for this web_contents.
   ZoomController::ZoomChangedEventData zoom_change_data(
       web_contents,
       new_default_zoom_level,
       new_default_zoom_level,
       ZoomController::ZOOM_MODE_DEFAULT,
       true);
   ZoomChangedWatcher zoom_change_watcher(web_contents, zoom_change_data);
   // TODO(wjmaclean): Convert this to call partition-specific zoom level prefs
   // when they become available.
-  browser()->profile()->GetPrefs()->SetDouble(prefs::kDefaultZoomLevel,
-                                              new_default_zoom_level);
+  browser()->profile()->GetZoomLevelPrefs()->SetDefaultZoomLevelPref(
+      new_default_zoom_level);
   // Because this test relies on a round-trip IPC to/from the renderer process,
   // we need to wait for it to propagate.
   zoom_change_watcher.Wait();
 }
 
 IN_PROC_BROWSER_TEST_F(ZoomControllerBrowserTest, ErrorPagesDoNotZoom) {
   ui_test_utils::NavigateToURL(browser(), GURL("http://kjfhkjsdf.com"));
   content::WebContents* web_contents =
       browser()->tab_strip_model()->GetActiveWebContents();
 
   ZoomController* zoom_controller =
       ZoomController::FromWebContents(web_contents);
   EXPECT_EQ(
       content::PAGE_TYPE_ERROR,
       web_contents->GetController().GetLastCommittedEntry()->GetPageType());
 
   double old_zoom_level = zoom_controller->GetZoomLevel();
   double new_zoom_level = old_zoom_level + 0.5;
 
   // The following attempt to change the zoom level for an error page should
   // fail.
   zoom_controller->SetZoomLevel(new_zoom_level);
   EXPECT_FLOAT_EQ(old_zoom_level, zoom_controller->GetZoomLevel());
 }