Check-in rlz code to src\rlz from http://code.google.com/p/rlz/.

rlz/lib/rlz_lib_clear.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.
+
+// The methods in this file belong conceptually to rlz_lib.cc. However, some
+// programs depend on rlz only to call ClearAllProductEvents(), so this file
+// contains this in fairly self-contained form to make it easier for linkers
+// to strip away most of rlz. In particular, this file should not reference any
+// symbols defined in financial_ping.cc.
+
+#include "rlz/lib/rlz_lib.h"
+
+#include "base/lazy_instance.h"
+#include "rlz/lib/assert.h"
+#include "rlz/lib/rlz_value_store.h"
+
+namespace rlz_lib {
+
+bool ClearAllProductEvents(Product product) {
+  rlz_lib::ScopedRlzValueStoreLock lock;
+  rlz_lib::RlzValueStore* store = lock.GetStore();
+  if (!store || !store->HasAccess(rlz_lib::RlzValueStore::kWriteAccess))
+    return false;
+
+  bool result;
+  result = store->ClearAllProductEvents(product);
+  result &= store->ClearAllStatefulEvents(product);
+  return result;
+}
+
+void ClearProductState(Product product, const AccessPoint* access_points) {
+  rlz_lib::ScopedRlzValueStoreLock lock;
+  rlz_lib::RlzValueStore* store = lock.GetStore();
+  if (!store || !store->HasAccess(rlz_lib::RlzValueStore::kWriteAccess))
+    return;
+
+  // Delete all product specific state.
+  VERIFY(ClearAllProductEvents(product));
+  VERIFY(store->ClearPingTime(product));
+
+  // Delete all RLZ's for access points being uninstalled.
+  if (access_points) {
+    for (int i = 0; access_points[i] != NO_ACCESS_POINT; i++) {
+      VERIFY(store->ClearAccessPointRlz(access_points[i]));
+    }
+  }
+
+  store->CollectGarbage();
+}
+
+static base::LazyInstance<std::string>::Leaky g_supplemental_branding;
+
+SupplementaryBranding::SupplementaryBranding(const char* brand)
+    : lock_(new ScopedRlzValueStoreLock) {
+  if (!lock_->GetStore())
+    return;
+
+  if (!g_supplemental_branding.Get().empty()) {
+    ASSERT_STRING("ProductBranding: existing brand is not empty");
+    return;
+  }
+
+  if (brand == NULL || brand[0] == 0) {
+    ASSERT_STRING("ProductBranding: new brand is empty");
+    return;
+  }
+
+  g_supplemental_branding.Get() = brand;
+}
+
+SupplementaryBranding::~SupplementaryBranding() {
+  if (lock_->GetStore())
+    g_supplemental_branding.Get().clear();
+  delete lock_;
+}
+
+// static
+const std::string& SupplementaryBranding::GetBrand() {
+  return g_supplemental_branding.Get();
+}
+
+}  // namespace rlz_lib