Implement the gamepad API in the IPC proxy

ppapi/shared_impl/ppapi_permissions.h

 // Copyright (c) 2012 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.
 
 #ifndef PPAPI_SHARED_IMPL_PPAPI_PERMISSIONS_H_
 #define PPAPI_SHARED_IMPL_PPAPI_PERMISSIONS_H_
 
 #include "base/basictypes.h"
 #include "ppapi/shared_impl/ppapi_shared_export.h"
 
 namespace ppapi {
 
 enum Permission {
   // Allows access to dev interfaces.
   PERMISSION_DEV = 1 << 0,
 
   // Allows access to Browser-internal interfaces.
   PERMISSION_PRIVATE = 1 << 2,
 
   // Allows ability to bypass user-gesture checks for showing things like
   // file select dialogs.
   PERMISSION_BYPASS_USER_GESTURE = 1 << 3
+
+  // NOTE: If you add stuff be sure to update AllPermissions().
 };
 
 class PPAPI_SHARED_EXPORT PpapiPermissions {
  public:
   // Initializes the permissions struct with no permissions.
   PpapiPermissions();
 
   // Initializes with the given permissions bits set.
   explicit PpapiPermissions(uint32 perms);
 
   ~PpapiPermissions();
 
+  // Returns a permissions class with all features enabled. This is for testing
+  // and manually registered plugins.
+  static PpapiPermissions AllPermissions();
+
   bool HasPermission(Permission perm) const;
 
  private:
   uint32 permissions_;
 
   // Note: Copy & assign supported.
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_PPAPI_PERMISSIONS_H_