Implement support for disabling sync through configuration management.

chrome/browser/profile.h

 // Copyright (c) 2010 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.
 
 // This class gathers state related to a single user profile.
 
 #ifndef CHROME_BROWSER_PROFILE_H_
 #define CHROME_BROWSER_PROFILE_H_
 
 #include <set>
@@ skipping 430 matching lines @@
 
   void ResumeAccessibilityEvents() {
     DCHECK(accessibility_pause_level_ > 0);
     accessibility_pause_level_--;
   }
 
   bool ShouldSendAccessibilityEvents() {
     return 0 == accessibility_pause_level_;
   }
 
+  // Checks whether sync is configurable by the user. Returns false if sync is
+  // disabled or controlled by configuration management.
+  bool IsSyncAccessible();
+
  protected:
   static URLRequestContextGetter* default_request_context_;
 
  private:
   bool restored_last_session_;
 
   // Accessibility events will only be propagated when the pause
   // level is zero.  PauseAccessibilityEvents and ResumeAccessibilityEvents
   // increment and decrement the level, respectively, rather than set it to
   // true or false, so that calls can be nested.
@@ skipping 202 matching lines @@
   scoped_refptr<history::TopSites> top_sites_;  // For history and thumbnails.
 
 #if defined(OS_CHROMEOS)
   chromeos::Preferences chromeos_preferences_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ProfileImpl);
 };
 
 #endif  // CHROME_BROWSER_PROFILE_H_