Remove gcm channel state supported by sync service.

sync/internal_api/sync_manager_impl.cc

 // 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.
 
 #include "sync/internal_api/sync_manager_impl.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 952 matching lines @@
   if (pre_commit_update_avoidance_node.InitByClientTagLookup(
           syncer::EXPERIMENTS,
           syncer::kPreCommitUpdateAvoidanceTag) == BaseNode::INIT_OK) {
     session_context_->set_server_enabled_pre_commit_update_avoidance(
         pre_commit_update_avoidance_node.GetExperimentsSpecifics().
             pre_commit_update_avoidance().enabled());
     // We don't bother setting found_experiment.  The frontend doesn't need to
     // know about this.
   }
 
-  ReadNode gcm_channel_node(&trans);
-  if (gcm_channel_node.InitByClientTagLookup(
-          syncer::EXPERIMENTS,
-          syncer::kGCMChannelTag) == BaseNode::INIT_OK &&
-      gcm_channel_node.GetExperimentsSpecifics().gcm_channel().has_enabled()) {
-    experiments->gcm_channel_state =
-        (gcm_channel_node.GetExperimentsSpecifics().gcm_channel().enabled() ?
-         syncer::Experiments::ENABLED : syncer::Experiments::SUPPRESSED);
-    found_experiment = true;
-  }
-
   ReadNode enhanced_bookmarks_node(&trans);
   if (enhanced_bookmarks_node.InitByClientTagLookup(
           syncer::EXPERIMENTS, syncer::kEnhancedBookmarksTag) ==
           BaseNode::INIT_OK &&
       enhanced_bookmarks_node.GetExperimentsSpecifics()
           .has_enhanced_bookmarks()) {
     const sync_pb::EnhancedBookmarksFlags& enhanced_bookmarks =
         enhanced_bookmarks_node.GetExperimentsSpecifics().enhanced_bookmarks();
     if (enhanced_bookmarks.has_enabled())
       experiments->enhanced_bookmarks_enabled = enhanced_bookmarks.enabled();
@@ skipping 57 matching lines @@
 bool SyncManagerImpl::HasDirectoryTypeDebugInfoObserver(
     syncer::TypeDebugInfoObserver* observer) {
   return model_type_registry_->HasDirectoryTypeDebugInfoObserver(observer);
 }
 
 void SyncManagerImpl::RequestEmitDebugInfo() {
   model_type_registry_->RequestEmitDebugInfo();
 }
 
 }  // namespace syncer