Remove InstanceID field trial, since it is always enabled

components/gcm_driver/instance_id/instance_id_driver.cc

 // Copyright 2015 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 "components/gcm_driver/instance_id/instance_id_driver.h"
 
-#include "base/metrics/field_trial.h"
 #include "build/build_config.h"
 #include "components/gcm_driver/instance_id/instance_id.h"
 
 namespace instance_id {
 
-namespace {
-#if !defined(OS_ANDROID)
-const char kInstanceIDFieldTrialName[] = "InstanceID";
-const char kInstanceIDFieldTrialEnabledGroupName[] = "Enabled";
-#endif    // !defined(OS_ANDROID)
-}  // namespace
-
 // static
 bool InstanceIDDriver::IsInstanceIDEnabled() {
 #if defined(OS_ANDROID)
   // Not implemented yet.
   return false;
 #else
-  std::string group_name =
-      base::FieldTrialList::FindFullName(kInstanceIDFieldTrialName);
-  return group_name == kInstanceIDFieldTrialEnabledGroupName;
+  return true;
 #endif    // defined(OS_ANDROID)
 }
 
 InstanceIDDriver::InstanceIDDriver(gcm::GCMDriver* gcm_driver)
     : gcm_driver_(gcm_driver) {
 }
 
 InstanceIDDriver::~InstanceIDDriver() {
 }
 
@@ skipping 10 matching lines @@
 
 void InstanceIDDriver::RemoveInstanceID(const std::string& app_id) {
   instance_id_map_.erase(app_id);
 }
 
 bool InstanceIDDriver::ExistsInstanceID(const std::string& app_id) const {
   return instance_id_map_.find(app_id) != instance_id_map_.end();
 }
 
 }  // namespace instance_id