Add UMA histograms for policy loading.

chrome/browser/policy/policy_loader_win.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 CHROME_BROWSER_POLICY_POLICY_LOADER_WIN_H_
 #define CHROME_BROWSER_POLICY_POLICY_LOADER_WIN_H_
 
 #include <userenv.h>
 #include <windows.h>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/values.h"
 #include "base/win/object_watcher.h"
 #include "chrome/browser/policy/async_policy_loader.h"
 #include "chrome/browser/policy/policy_types.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace policy {
 
 class AppliedGPOListProvider;
+class PolicyLoadStatusSample;
 class PolicyMap;
 struct PolicyDefinitionList;
 
 // Interface for mocking out GPO enumeration in tests.
 class AppliedGPOListProvider {
  public:
   virtual ~AppliedGPOListProvider() {}
   virtual DWORD GetAppliedGPOList(DWORD flags,
                                   LPCTSTR machine_name,
                                   PSID sid_user,
@@ skipping 20 matching lines @@
   virtual void InitOnFile() OVERRIDE;
   virtual scoped_ptr<PolicyBundle> Load() OVERRIDE;
 
  private:
   // Builds the Chrome policy schema in |chrome_policy_schema_|.
   void BuildChromePolicySchema();
 
   // Reads Chrome Policy from a PReg file at the given path and stores the
   // result in |policy|.
   bool ReadPRegFile(const base::FilePath& preg_file,
-                    base::DictionaryValue* policy);
+                    base::DictionaryValue* policy,
+                    PolicyLoadStatusSample *status);
 
   // Loads and parses GPO policy in |policy_object_list| for scope |scope|. If
   // successful, stores the result in |policy| and returns true. Returns false
   // on failure reading the policy, indicating that policy loading should fall
   // back to reading the registry.
   bool LoadGPOPolicy(PolicyScope scope,
                      PGROUP_POLICY_OBJECT policy_object_list,
-                     base::DictionaryValue* policy);
+                     base::DictionaryValue* policy,
+                     PolicyLoadStatusSample *status);
 
   // Queries Windows for applied group policy and writes the result to |policy|.
   // This is the preferred way to obtain GPO data, there are reports of abuse
   // of the registry GPO keys by 3rd-party software.
-  bool ReadPolicyFromGPO(PolicyScope scope, base::DictionaryValue* policy);
+  bool ReadPolicyFromGPO(PolicyScope scope,
+                         base::DictionaryValue* policy,
+                         PolicyLoadStatusSample *status);
 
   // Parses Chrome policy from |gpo_dict| for the given |scope| and |level| and
   // merges it into |chrome_policy_map|.
   void LoadChromePolicy(const base::DictionaryValue* gpo_dict,
                         PolicyLevel level,
                         PolicyScope scope,
                         PolicyMap* chrome_policy_map);
 
   // Loads 3rd-party policy from |gpo_dict| and merges it into |bundle|.
   void Load3rdPartyPolicy(const base::DictionaryValue* gpo_dict,
@@ skipping 18 matching lines @@
   base::win::ObjectWatcher machine_policy_watcher_;
   bool user_policy_watcher_failed_;
   bool machine_policy_watcher_failed_;
 
   DISALLOW_COPY_AND_ASSIGN(PolicyLoaderWin);
 };
 
 }  // namespace policy
 
 #endif  // CHROME_BROWSER_POLICY_POLICY_LOADER_WIN_H_