Purge cache when the server removes the policy for an extension.

components/policy/core/common/cloud/cloud_policy_manager.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 "components/policy/core/common/cloud/cloud_policy_manager.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 90 matching lines @@
     UpdatePolicy(bundle.Pass());
   }
 }
 
 void CloudPolicyManager::GetChromePolicy(PolicyMap* policy_map) {
   policy_map->CopyFrom(store()->policy_map());
 }
 
 void CloudPolicyManager::CreateComponentCloudPolicyService(
     const base::FilePath& policy_cache_path,
-    const scoped_refptr<net::URLRequestContextGetter>& request_context) {
+    const scoped_refptr<net::URLRequestContextGetter>& request_context,
+    CloudPolicyClient* client) {
 #if !defined(OS_ANDROID) && !defined(OS_IOS)
   // Init() must have been called.
-  DCHECK(schema_registry());
+  CHECK(schema_registry());
   // Called at most once.
-  DCHECK(!component_policy_service_);
+  CHECK(!component_policy_service_);
+  // The core can't be connected yet.
+  // See the comments on ComponentCloudPolicyService for the details.
+  CHECK(!core()->client());
 
   if (CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableComponentCloudPolicy) ||
       policy_cache_path.empty()) {
     return;
   }
 
   // TODO(joaodasilva): Move the |file_task_runner_| to the blocking pool.
   // Currently it's not possible because the ComponentCloudPolicyStore is
   // NonThreadSafe and doesn't support getting calls from different threads.
   scoped_ptr<ResourceCache> resource_cache(
       new ResourceCache(policy_cache_path, file_task_runner_));
   component_policy_service_.reset(new ComponentCloudPolicyService(
       this,
       schema_registry(),
       core(),
+      client,
       resource_cache.Pass(),
       request_context,
       file_task_runner_,
       io_task_runner_));
 #endif  // !defined(OS_ANDROID) && !defined(OS_IOS)
 }
 
 void CloudPolicyManager::ClearAndDestroyComponentCloudPolicyService() {
 #if !defined(OS_ANDROID) && !defined(OS_IOS)
   if (component_policy_service_) {
     component_policy_service_->ClearCache();
     component_policy_service_.reset();
   }
 #endif  // !defined(OS_ANDROID) && !defined(OS_IOS)
 }
 
 void CloudPolicyManager::OnRefreshComplete(bool success) {
   waiting_for_policy_refresh_ = false;
   CheckAndPublishPolicy();
 }
 
 }  // namespace policy