[Sync] Rip out overly-complicated ExtensionData class

chrome/browser/sync/glue/extension_util.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_GLUE_EXTENSION_UTIL_H_
 #define CHROME_BROWSER_SYNC_GLUE_EXTENSION_UTIL_H_
 #pragma once
 
 // This file contains some low-level utility functions used by
 // extensions sync.
 
 #include <string>
 
 class Extension;
-class ExtensionServiceInterface;
 struct ExtensionSyncData;
 
 namespace sync_pb {
 class ExtensionSpecifics;
 }  // sync_pb
 
 namespace browser_sync {
 
 // Returns whether or not the given extension is one we want to sync.
 bool IsExtensionValid(const Extension& extension);
 
 // Stringifies the given ExtensionSpecifics.
 std::string ExtensionSpecificsToString(
     const sync_pb::ExtensionSpecifics& specifics);
 
-// Returns whether or not the values of the given specifics are valid,
-// in particular the id, version, and update URL.
-bool IsExtensionSpecificsValid(
-    const sync_pb::ExtensionSpecifics& specifics);
-
-// Equivalent to DCHECK(IsExtensionSpecificsValid(specifics)) <<
-// ExtensionSpecificsToString(specifics);
-void DcheckIsExtensionSpecificsValid(
-    const sync_pb::ExtensionSpecifics& specifics);
-
-// Returns true iff two ExtensionSpecifics denote the same extension
-// state.  Neither |a| nor |b| need to be valid.
-bool AreExtensionSpecificsEqual(const sync_pb::ExtensionSpecifics& a,
-                                const sync_pb::ExtensionSpecifics& b);
-
-// Returns true iff the given ExtensionSpecifics is equal to the empty
-// ExtensionSpecifics object.  |specifics| does not have to be valid
-// and indeed, IsExtensionSpecificsValid(specifics) ->
-// !IsExtensionSpecificsUnset(specifics).
-bool IsExtensionSpecificsUnset(
-    const sync_pb::ExtensionSpecifics& specifics);
-
-// Copies the user properties from |specifics| into |dest_specifics|.
-// User properties are properties that are set by the user, i.e. not
-// inherent to the extension.  Currently they include |enabled| and
-// |incognito_enabled|.  Neither parameter need be valid.
-void CopyUserProperties(
-    const sync_pb::ExtensionSpecifics& specifics,
-    sync_pb::ExtensionSpecifics* dest_specifics);
-
-// Copies everything but non-user properties.  Neither parameter need
-// be valid.
-void CopyNonUserProperties(
-    const sync_pb::ExtensionSpecifics& specifics,
-    sync_pb::ExtensionSpecifics* dest_specifics);
-
-// Returns true iff two ExtensionSpecifics have the same user
-// properties.  Neither |a| nor |b| need to be valid.
-bool AreExtensionSpecificsUserPropertiesEqual(
-    const sync_pb::ExtensionSpecifics& a,
-    const sync_pb::ExtensionSpecifics& b);
-
-// Returns true iff two ExtensionSpecifics have the same non-user
-// properties.  Neither |a| nor |b| need to be valid.
-bool AreExtensionSpecificsNonUserPropertiesEqual(
-    const sync_pb::ExtensionSpecifics& a,
-    const sync_pb::ExtensionSpecifics& b);
-
-// Merge |specifics| into |merged_specifics|.  Both must be valid and
-// have the same ID.  The merge policy is currently to copy the
-// non-user properties of |specifics| into |merged_specifics| (and the
-// user properties if |merge_user_properties| is set) if |specifics|
-// has a more recent or the same version as |merged_specifics|.
-void MergeExtensionSpecifics(
-    const sync_pb::ExtensionSpecifics& specifics,
-    bool merge_user_properties,
-    sync_pb::ExtensionSpecifics* merged_specifics);
-
 // Fills |sync_data| with the data from |specifics|.  Returns true iff
 // succesful.
 bool SpecificsToSyncData(
     const sync_pb::ExtensionSpecifics& specifics,
     ExtensionSyncData* sync_data);
 
 // Fills |specifics| with the data from |sync_data|.
 void SyncDataToSpecifics(
     const ExtensionSyncData& sync_data,
     sync_pb::ExtensionSpecifics* specifics);
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_EXTENSION_UTIL_H_