Componentize //chrome/browser/prefs/tracked.

chrome/browser/prefs/tracked/tracked_atomic_preference.cc

-// Copyright 2014 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 "chrome/browser/prefs/tracked/tracked_atomic_preference.h"
-
-#include "base/values.h"
-#include "chrome/browser/prefs/tracked/pref_hash_store_transaction.h"
-#include "chrome/browser/prefs/tracked/tracked_preference_validation_delegate.h"
-
-TrackedAtomicPreference::TrackedAtomicPreference(
-    const std::string& pref_path,
-    size_t reporting_id,
-    size_t reporting_ids_count,
-    PrefHashFilter::EnforcementLevel enforcement_level,
-    PrefHashFilter::ValueType value_type,
-    TrackedPreferenceValidationDelegate* delegate)
-    : pref_path_(pref_path),
-      helper_(pref_path, reporting_id, reporting_ids_count, enforcement_level,
-              value_type),
-      delegate_(delegate) {
-}
-
-void TrackedAtomicPreference::OnNewValue(
-    const base::Value* value,
-    PrefHashStoreTransaction* transaction) const {
-  transaction->StoreHash(pref_path_, value);
-}
-
-bool TrackedAtomicPreference::EnforceAndReport(
-    base::DictionaryValue* pref_store_contents,
-    PrefHashStoreTransaction* transaction) const {
-  const base::Value* value = NULL;
-  pref_store_contents->Get(pref_path_, &value);
-  PrefHashStoreTransaction::ValueState value_state =
-      transaction->CheckValue(pref_path_, value);
-
-  helper_.ReportValidationResult(value_state);
-
-  TrackedPreferenceHelper::ResetAction reset_action =
-      helper_.GetAction(value_state);
-  if (delegate_) {
-    delegate_->OnAtomicPreferenceValidation(
-        pref_path_, value, value_state, helper_.IsPersonal());
-  }
-  helper_.ReportAction(reset_action);
-
-  bool was_reset = false;
-  if (reset_action == TrackedPreferenceHelper::DO_RESET) {
-    pref_store_contents->RemovePath(pref_path_, NULL);
-    was_reset = true;
-  }
-
-  if (value_state != PrefHashStoreTransaction::UNCHANGED) {
-    // Store the hash for the new value (whether it was reset or not).
-    const base::Value* new_value = NULL;
-    pref_store_contents->Get(pref_path_, &new_value);
-    transaction->StoreHash(pref_path_, new_value);
-  }
-
-  return was_reset;
-}